Estimating the executive demands of a one-back choice reaction time task by means of the selective interference paradigm

The present study proposes a new executive task, the one-back choice reaction time (RT) task, and implements the selective interference paradigm to estimate the executive demands of the processing components involved in this task. Based on the similarities between a one-back choice RT task and the n-back updating task, it was hypothesized that one-back delaying of a choice reaction involves executive control. In three experiments, framed within Baddeley's (1986) Baddeley, A. 1986. Working memory, Edited by: Baddeley, A. Oxford, , UK: Oxford University Press.  [Google Scholar] working-memory model, a one-back choice RT task, a choice RT task, articulatory suppression, and matrix tapping were performed concurrently with primary tasks involving verbal, visuospatial, and executive processing. The results demonstrate that one-back delaying of a choice reaction interferes with tasks requiring executive control, while the potential interference at the level of the verbal or visuospatial working memory slave systems remains minimal.     

Feature binding and attention in working memory: A resolution of previous contradictory findings

We aimed to resolve an apparent contradiction between previous experiments from different laboratories, using dual-task methodology to compare effects of a concurrent executive load on immediate recognition memory for colours or shapes of items or their colour–shape combinations. Results of two experiments confirmed previous evidence that an irrelevant attentional load interferes equally with memory for features and memory for feature bindings. Detailed analyses suggested that previous contradictory evidence arose from limitations in the way recognition memory was measured. The present findings are inconsistent with an earlier suggestion that feature binding takes place within a multimodal episodic buffer Baddeley, (2000 Baddeley, A. D. 2000. The episodic buffer: A new component of working memory?. Trends in Cognitive Sciences, 4(11): 417–423. (doi:10.1016/S1364-6613(00)01538-2)[Crossref], [PubMed], [Web of Science ®] , [Google Scholar]) and support a subsequent account in which binding takes place automatically prior to information entering the episodic buffer Baddeley, Allen, & Hitch, (2011 Baddeley, A. D., Allen, R. J. and Hitch, G. J. 2011. Binding in visual working memory: The role of the episodic buffer. Neuropsychologia, 49: 1393–1400. (doi:10.1016/j.neuropsychologia.2010.12.042)[Crossref], [PubMed], [Web of Science ®] , [Google Scholar]). Methodologically, the results suggest that different measures of recognition memory performance (A′, d′, corrected recognition) give a converging picture of main effects, but are less consistent in detecting interactions. We suggest that this limitation on the reliability of measuring recognition should be taken into account in future research so as to avoid problems of replication that turn out to be more apparent than real.     

Phonological recoding under articulatory suppression

We report data from an experiment in which participants performed immediate serial recall of visually presented words with or without articulatory suppression, while also performing homophone or rhyme detection. The separation between homophonous or rhyming pairs in the list was varied. According to the working memory model (Baddeley, 1986; Baddeley & Hitch, 1974), suppression should prevent articulatory recoding. Nevertheless, rhyme and homophone detection was well above chance. However, with suppression, participants showed a greater tendency to false-alarm to orthographically related foils (e.g., GIVE–FIVE). This pattern is similar to that observed in short-term memory patients.     

Does working memory change with age? The interactions of concurrent articulation with the effects of word length and acoustic confusion

ABSTRACT

The effects of acoustic confusion (phonological similarity), word length, and concurrent articulation (articulatory suppression) are cited as support for Working Memory's phonological loop component (e.g., Baddeley, 2000 Baddeley, A. D. 2000. The phonological loop and irrelevant speech effect: Some comments on Neath. Psychonomic Bulletin and Review, 7: 544–549. [Crossref], [PubMed], [Web of Science ®] , [Google Scholar], Psychonomic Bulletin and Review, 7, 544). Research has focused on younger adults, with no studies examining whether concurrent articulation reduces the word length and acoustic confusion effects among older adults. In the current study, younger and older adults were given lists of similar and dissimilar letters (Experiment 1) or long and short words (Experiment 2) for immediate serial reconstruction of order. Items were presented visually or auditorily, with or without concurrent articulation. As expected, younger and older adults demonstrated effects of acoustic confusion, word length, and concurrent articulation. Further, concurrent articulation reduced the effects of acoustic confusion and word length equally for younger and older adults. This suggests that age-related differences occur in overall performance, but do not reflect an age-related deficiency in the functioning of the phonological loop component of working memory.     

Expanding the Simple View of Reading in Accounting for Reading Skills in Community College Students

The simple view of reading (Gough & Tunmer, 1986 Gough, P. B. and Tunmer, W. E. 1986. Decoding, reading, and reading disability. RASE: Remedial and Special Education, 7: 6–10. [Crossref] , [Google Scholar]) proposes that listening comprehension and decoding, properly measured, can account for all of the variance in reading comprehension. We assessed the simple view in community college students. In addition to listening comprehension and decoding, we included measures of oral vocabulary, nonverbal reasoning, phonological awareness, reading fluency, and verbal working memory. In combination, the measures yielded an R² of.48, but only listening comprehension and reading fluency made independent contributions to reading comprehension. Predictors that best distinguished less skilled from average readers were phonological awareness and verbal working memory. These findings suggest a need to expand the simple view in accounting for individual differences among adult readers.     

The selective disruption of spatial working memory by eye movements

In the late 1970s/early 1980s, Baddeley and colleagues conducted a series of experiments investigating the role of eye movements in visual working memory. Although only described briefly in a book (Baddeley, 1986), these studies have influenced a remarkable number of empirical and theoretical developments in fields ranging from experimental psychology to human neuropsychology to nonhuman primate electrophysiology. This paper presents, in full detail, three critical studies from this series, together with a recently performed study that includes a level of eye movement measurement and control that was not available for the older studies. Together, the results demonstrate several facts about the sensitivity of visuospatial working memory to eye movements. First, it is eye movement control, not movement per se, that produces the disruptive effects. Second, these effects are limited to working memory for locations and do not generalize to visual working memory for shapes. Third, they can be isolated to the storage/maintenance components of working memory (e.g., to the delay period of the delayed-recognition task). These facts have important implications for models of visual working memory.     

Interactions Between Modality of Working Memory Load and Perceptual Load in Distractor Processing

The present study investigated interactions between working memory load and perceptual load. The load theory (Lavie, Hirst, de Fockert, &; Viding, 2004 Lavie, N., Hirst, A., de Fockert, J.W., &; Viding, E. (2004). Load theory of selective attention and cognitive control. Journal of Experimental Psychology: General, 133, 339–354.[Crossref], [PubMed], [Web of Science ®] , [Google Scholar]) claims that perceptual load decreases distractor interference, whereas working memory load increases interference. However, recent studies showed that effects of working memory might depend on the relationship between modalities of working memory and task stimuli. Here, we examined whether the relationship between working memory load and perceptual load would remain the same across modalities. The results of Experiment 1 showed that verbal working memory load did not affect a compatibility effect for low perceptual load, whereas it increased the compatibility effect for high perceptual load. In Experiment 2, the compatibility effect remained the same regardless of visual working memory load. These results suggest that the effects of working memory load and perceptual load depend on the relationship between the modalities of working memory and stimuli.     

Institutional creativity and pathologies of potential space: The modern university

Abstract

This paper proposes the applicability of object relations psychoanalytic conceptions of dialogue (Ogden, 1986 Ogden, T. 1986. The matrix of the mind, London: Karnac.  [Google Scholar], 1993 Ogden, T. 1993. “On potential space”. In In one's bones: The clinical genius of Winnicot, Edited by: Goldman, D. Northvale, NJ: Jason Aaronson.  [Google Scholar]) to thinking about relationships and relational structures and their governance in universities. It proposes that:

• the qualities of dialogic relations in creative institutions are the proper index of creative productivity; that is of, as examples, ‘thinking’ (Evans, 2004 Evans, M. 2004. Killing thinking: The death of the universities, London: Continuum.  [Google Scholar]), ‘emotional learning’ (Salzberger-Wittenburg et al., 1983 Salzberger-Wittenburg, I., Henry, G. and Osborne, E. 1983. The emotional experience of learning and teaching, London: Routledge.  [Google Scholar]) or ‘criticality’ (Barnett, 1997 Barnett, R. 1997. Higher education: A critical business, Buckingham: Open University Press.  [Google Scholar]);

• contemporary institutions' explicit preoccupation in assuring, monitoring and managing creative ‘dialogue’ can, in practice, pervert creative processes and thoughtful symbolic productivity, thus inhibiting students' development and the quality of ‘thinking space’ for teaching and research.

In this context the paper examines uncanny and perverse connections between Paulo Freire's (1972 Freire, P. 1972. Pedagogy of the oppressed, London: Penguin.  [Google Scholar]) account of educational empowerment and dialogics (from his Pedagogy of the oppressed) to the consumerist (see, for example, Clarke & Vidler, 2005 Clarke, J. and Vidler, E. 2005. Creating citizen-consumers: New labour and the remaking of public services. Public Policy and Administration, 20: 19–37.  [Google Scholar]) rhetoric of student empowerment, as mediated by some strands of managerialism in contemporary higher education. The paper grounds its critique of current models of dialogue, feedback loops, audit and other mechanisms of accountability (Power, 1997 Power, M. 1997. The Audit Society: Ritual's of verification, Oxford: Oxford University Press.  [Google Scholar]; Strathern, 2000 Strathern M. Audit cultures: Anthropological studies in accountability, ethics and the academy London Routledge 2000 [Crossref] , [Google Scholar]), in a close analysis of how creative thinking emerges.

The paper discusses the failure to maintain a dialogic space in humanities and social science areas in particular, exploring psychoanalytic conceptions from Donald Winnicott (1971 Winnicott, D. W. 1971. Playing and Reality, London: Routledge.  [Google Scholar]), Milner (1979 Milner, M. 1979. On not being able to paint, New York: International Universities Press.  [Google Scholar]), Thomas Ogden (1986 Ogden, T. 1986. The matrix of the mind, London: Karnac.  [Google Scholar]) and Csikszentmihalyi (1997 Csikszentmihalyi, M. 1997. Creativity, New York: Harper Perennial.  [Google Scholar]). Coleridge's ideas about imagination as the movement of thought between subjective and objective modes are discussed in terms of both intra- and inter-subjective relational modes of ‘dialogue’, which are seen as subject to pathology in the pathologically structured psychosocial environment. Current patterns of institutional governance, by micromanaging dialogic spaces, curtail the ‘natural’ rhythms and temporalities of imagination by giving an over-emphasis to the moment of outcome, at the expense of holding the necessary vagaries of process in the institutional ‘mind’. On the contrary, as this paper argues, creative thinking lies in sporadic emergences at the conjunction of object/(ive) outcome and through (thought) processes.     

Effects of age,dysphoria, and emotion‐focusing on autobiographical memory specificity in children

Overgeneral autobiographical memory (OGM) is strongly associated with depression in adults and appears to reflect a stable cognitive bias. However, it is not known whether this bias exists in children or what factors contribute to its development. We examined the roles of age, dysphoria, and a new variable, emotion‐focusing (EF), on the production of specific autobiographical memory (AM) in children, using the standard Autobiographical Memory Test (AMT; Williams & Broadbent, 1986 Williams, JMG and Broadbent, K. (1986). Autobiographical memory in suicide attempters. Journal of Abnormal Psychology, 95: 144–149. [Crossref], [PubMed], [Web of Science ®] , [Google Scholar]). Results show that older children are more specific than younger children, irrespective of cue valence. Dysphoria was linked to less specific retrieval of positive memories in children. A three‐way interaction between age, valence, and dysphoria was also found, such that older dysphoric children demonstrated a difficulty in retrieving specific negative memories. In addition, emotion‐focusing was associated with specific AM recall, especially to negative cues. Results are discussed with reference to the development of depressogenic biases.     

IMAGINARY TALES IN THE LAND OF THE PERPETRATORS

This article explores three recent works of fiction, all concerned with what I call “imaginary tales in the land of the perpetrators”. All the writers are women, albeit of varied backgrounds and nationalities. The earliest is Marcie Hershman (American, Tales of the Master Race, 1991 Hershman, Marcie. 1991. Tales of the Master Race, New York: HarperCollins.  [Google Scholar]), followed by Gila Lustiger (German‐Jewish, Die Bestandsaufnahme, 1995, published in English as The Inventory, 2001 Lustiger, Gila. 2001. The Inventory, Edited by: Morrison, Rebecca. New York: Arcade.  [Google Scholar]) and Rachel Seiffert (British, The Dark Room, 2001 Seiffert, Rachel. 2001. The Dark Room, New York: Pantheon Books.  [Google Scholar]). Although only Lustiger is the child of a survivor, all may be counted in the ranks of the second, or even third generation, who strive, each in their way, to recreate the day‐to‐day workings of society in the lives of “ordinary folk” under the Third Reich, to pose once again that all‐consuming question: How could it have happened? Working at the intersection of history and fiction, fact and invention, imagination and memory, these novels may indicate a new and more risky trend in Holocaust literature away from the victims to the victimizers.     

Subjective shortening with filled and unfilled auditory and visual intervals in humans?

Two experiments tested humans on a memory for duration task based on the method of Wearden and Ferrara (1993) Wearden, J. H. and Ferrara, A. 1993. Subjective shortening in humans' memory for stimulus duration. Quarterly Journal of Experimental Psychology, 46B: 163–186.  [Google Scholar], which had previously provided evidence for subjective shortening in memory for stimulus duration. Auditory stimuli were tones (filled) or click-defined intervals (unfilled). Filled visual stimuli were either squares or lines, with the unfilled interval being the time between two line presentations. In Experiment 1, good evidence for subjective shortening was found when filled and unfilled visual stimuli, or filled auditory stimuli, were used, but evidence for subjective shortening with unfilled auditory stimuli was more ambiguous. Experiment 2 used a simplified variant of the Wearden and Ferrara task, and evidence for subjective shortening was obtained from all four stimulus types.     

Is overgeneral autobiographical memory an isolated memory phenomenon in major depression?

The present study explored the relation between overgeneral autobiographical memory (AM) and other aspects of memory functioning in depression. A total of 26 patients with major depressive disorder completed a set of memory tasks measuring AM specificity (AMT; Williams & Broadbent, 1986), working memory, semantic memory, verbal learning, delayed verbal recall, recognition memory, and source memory. Reduced specificity of AM was related to poor working memory (central executive functioning) and poor source memory. The former finding conforms to the idea that the voluntary retrieval of specific autobiographical memories (AMs) involves central executive processes (e.g., Conway & Pleydell-Pearce, 2000 Conway, M. A. and Pleydell-Pearce, C. W. 2000. The construction of autobiographical memories in the self-memory system. Psychological Review, 107: 261–288. [Crossref], [PubMed], [Web of Science ®] , [Google Scholar]). The latter finding replicates and extends recent findings suggesting that overgeneral AM is part of a broader memory deficit in retrieving the specific details of the context in which information was acquired (Ramponi, Barnard, & Nimmo-Smith, 2004 Raes , F. , Hermans , D. , Williams , J. M. G. , Demyttenaere , K. , Sabbe , B. , Pieters , G . & Eelen , P. ( 2004 ). Reduced specificity of autobiographical memory: A mediator between rumination and ineffective social problem solving in major depression? Journal of affective disorders , 87 , 331 – 335  [Google Scholar]). Furthermore, in line with Ramponi et al. (2004 Raes , F. , Hermans , D. , Williams , J. M. G. , Demyttenaere , K. , Sabbe , B. , Pieters , G . & Eelen , P. ( 2004 ). Reduced specificity of autobiographical memory: A mediator between rumination and ineffective social problem solving in major depression? Journal of affective disorders , 87 , 331 – 335  [Google Scholar]), rumination was found to be related to both overgeneral AM and poor source memory.     

Mental models in propositional reasoning and working memory's central executive

We examine the role of working memory's central executive in the mental model explanation of propositional reasoning by using two working memory measures: the classical “reading span” test by Daneman and Carpenter (1980 Daneman, M. and Carpenter, P. A. 1980. Individual differences in working memory and reading. Journal of Verbal Learning and Verbal Behavior, 19: 450–466. [Crossref] , [Google Scholar]) and a new measure. This new “reasoning span” measure requires individuals to solve very simple anaphora problems, and store and remember the word solution in a growing series of inferential problems. We present one experiment in which we check the involvement of the central executive in conditional and disjunctive inference tasks and compare predictions of the new reasoning span test with those of the classical reading span test. The results of the experiment confirm that reasoning responses, which according to mental model theory require high cognitive work, are predicted by working memory measures. Results also show that some reasoning responses are probably obtained by means of superficial biases or strategies that do not load working memory. The reasoning span test, which involves the central executive to a greater degree, predicts reasoning performance better than the reading span test. The significance and possibilities of the new measure in studying reasoning are discussed.     

PLAYING FATHERS' GAMES

“The Blank Page”, Isak Dinesen's Dinesen Isak Last Tales Harmondsworth: Penguin 1986  [Google Scholar] acclaimed story and its feminist reading, led by Susan Gubar's Gubar Susan “?‘The Blank Page’ and Issues of Female Creativity.” The New Feminist Criticism Ed. Elaine Showalter. London: Virago 1986 292 313  [Google Scholar] seminal work, epitomizes the defiance and subversiveness of women's writing. However, what Dinesen refers to in her story as “the germ” of women's narratives, has been ignored. This germ or source is the biblical story of Achsah, the daughter of Caleb (Joshua 15 and Judges 1), a dramatic story of concealed subversion of a national leader who gambled with his daughter to advance his conquests, and that of a daughter who dared to defy her appropriation as the spoils of war. The biblical text and the traditional commentary accompanying it present the story as a domestic narrative of familial arrangements, therefore concealing its political significance and marginalizing it within the context of the national narrative of conquests and settlement in the land of Canaan. Re‐reading the text shifts the focus from the professed context, namely the narrative of conquest whose protagonist is Caleb, to the concealed one, namely the emotional junction of father–daughter relations, whose protagonist is Achsah. Reading the story of Achsah in this new context not only sheds light on Dinesen's view of women's subversiveness, but also outlines the politics of women's resistance and its implications.     

A Polytomous Model of Cognitive Diagnostic Assessment for Graded Data

Pursuing the line of the difference models in IRT (Thissen &; Steinberg, 1986 Thissen, D., &; Steinberg, L. (1986). A taxonomy of item response models. Psychometrika, 51:567–577. doi:10.1007/BF02295596.[Crossref], [Web of Science ®] , [Google Scholar]), this article proposed a new cognitive diagnostic model for graded/polytomous data based on the deterministic input, noisy, and gate (Haertel, 1989 Haertel, E. H. (1989). Using restricted latent class models to map the skill structure of achievement items. Journal of Educational Measurement, 26, 333–352. doi:10.1111/j.1745-3984.1989.tb00336.x.[Crossref], [Web of Science ®] , [Google Scholar]; Junker &; Sijtsma, 2001 Junker, B. W., &; Sijtsma, K. (2001). Cognitive assessment models with few assumptions, and connections with nonparametric item response theory. Applied Psychological Measurement, 25, 258–272. doi:10.1177/01466210122032064.[Crossref], [Web of Science ®] , [Google Scholar]), which is named the DINA model for graded data (DINA-GD). We investigated the performance of a full Bayesian estimation of the proposed model. In the simulation, the classification accuracy and item recovery for the DINA-GD model were investigated. The results indicated that the proposed model had acceptable examinees' correct attribute classification rate and item parameter recovery. In addition, a real-data example was used to illustrate the application of this new model with the graded data or polytomously scored items.     

Using another's gaze as an explicit aid to insight problem solving

Research has shown that implicitly guiding attention via visual cues or unrelated tasks can increase the likelihood of solving insight problems. We examined whether following another person making specific skin-crossing saccades could induce similar attentional shifts and increase solution rates for Duncker's ((1945) Duncker, K. 1945. On problem solving. Psychological Monographs, 58 (5, Whole No. 270)[Crossref] , [Google Scholar]) radiation problem. We presented 150 participants with one of three 30-s eye movement patterns from another problem solver: (a) focusing solely on the central tumour; (b) naturally making skin-crossing saccades between the outside area and the tumour from multiple angles; or (c) making deliberate skin-crossing saccades between the outside area and the tumour from multiple angles. Following another person making skin-crossing saccades increased the likelihood of solving the radiation problem. Our results demonstrate that another person's eye movements can promote attentional shifts that trigger insight problem solving.     

Reducing specificity of autobiographical memory in nonclinical participants: The role of rumination and schematic models

Two experiments are reported in which nondysphoric participants, not prone to excessive levels of rumination in everyday life, were asked to retrieve autobiographical memories using the Williams and Broadbent (1986 Williams, JMG and Broadbent, K. (1986). Autobiographical memory in suicide attempters. Journal of Abnormal Psychology, 95: 144–149. [Crossref], [PubMed], [Web of Science ®] , [Google Scholar]) procedure (AMT). In the first experiment, two variants of a self‐related category fluency task were interleaved among sets of autobiographical memory cues. In one variant (blocked) a normal model of analytic rumination was induced by grouping prompts on a single superordinate theme together. In the other (intermixed) prompts from several different themes were grouped together. It was predicted that the blocked variant would reduce the number of specific memories recollected and increase the number of categoric memories relative to the intermixed variant. This prediction was confirmed and provides the first demonstration of a bidirectional causal influence of analytic rumination on the balance between specific and categoric retrievals. A second experiment showed no alteration in this balance when the same fluency manipulation involved animal‐related categories rather than self‐related ones. The results support a two component model of autobiographical retrieval being driven in part by the extent to which an analytic mode of processing is adopted in the short term and in part by the level of differentiation in self‐related schematic models.     

Amplitude and Width Manipulations in Fitts' Paradigm: Comment on Heath et al. (2011) and Heath et al. (2016)

Heath, Weiler, Marriott, Elliott, and Binstead (2011 Heath, M., Weiler, J., Marriott, K. A., Elliott, D., &; Binstead, G. (2011). Revisiting Fitts and Peterson (1964): Width and Amplitude manipulations to the reaching environment elicit dissociable movement times. Canadian Journal of Experimental Psychology, 65, 259–268.1.[Crossref], [PubMed], [Web of Science ®] , [Google Scholar]) and Heath, Samani, Tremblay, and Elliott (2016 Heath, M., Samani, A., Tremblay, L., &; Elliott, D. (2016). Fitts' theorem in oculomotor control: Dissociable movement times for amplitude and width manipulations. Journal of Motor Behavior, 48, 489–499.[Taylor &; Francis Online], [Web of Science ®] , [Google Scholar]) have claimed that there are dissociable movement times for amplitude and width manipulations in the Fitts' paradigm. This may to some extent be true, but the Heath et al. (2011 Heath, M., Weiler, J., Marriott, K. A., Elliott, D., &; Binstead, G. (2011). Revisiting Fitts and Peterson (1964): Width and Amplitude manipulations to the reaching environment elicit dissociable movement times. Canadian Journal of Experimental Psychology, 65, 259–268.1.[Crossref], [PubMed], [Web of Science ®] , [Google Scholar]) and Heath et al. (2016 Heath, M., Samani, A., Tremblay, L., &; Elliott, D. (2016). Fitts' theorem in oculomotor control: Dissociable movement times for amplitude and width manipulations. Journal of Motor Behavior, 48, 489–499.[Taylor &; Francis Online], [Web of Science ®] , [Google Scholar]) data do not support that contention, as shown in this comment. It is shown that data from the research of Heath et al. is not in the range of index of difficulty where ongoing visual control would be used and hence their fits of data to Fitts' law are spurious. The data of Heath et al. (2011 Heath, M., Weiler, J., Marriott, K. A., Elliott, D., &; Binstead, G. (2011). Revisiting Fitts and Peterson (1964): Width and Amplitude manipulations to the reaching environment elicit dissociable movement times. Canadian Journal of Experimental Psychology, 65, 259–268.1.[Crossref], [PubMed], [Web of Science ®] , [Google Scholar]) for arm movements and for the primary eye saccade submovements of Heath et al. (2016 Heath, M., Samani, A., Tremblay, L., &; Elliott, D. (2016). Fitts' theorem in oculomotor control: Dissociable movement times for amplitude and width manipulations. Journal of Motor Behavior, 48, 489–499.[Taylor &; Francis Online], [Web of Science ®] , [Google Scholar]) are well correlated by the ballistic movement time equation of Hoffmann (1981 Hoffmann, E. R. (1981). An ergonomic approach to predetermined motion time systems. Proceedings of the 9th National Conference of the Institute of Industrial Engineers, Australia, 30–47. [Google Scholar]) and Gan and Hoffmann (1988 Gan, K.-C. &; Hoffmann, E. R. (1988). Geometrical conditions for ballistic and visually controlled movements. Ergonomics, 31, 829–839.[Taylor &; Francis Online], [Web of Science ®] , [Google Scholar]). When the ballistic equation is used to model data for constant amplitude and constant target width conditions, the effects of the amplitude and width manipulations disappear. Other research indicates that the independent effects of movement amplitude occur due to changes in the time for the distance-covering phase of the movement.     

Do masks terminate the icon?

Iconic memory is operationally defined by part-report experiments (Sperling, 1960 Sperling, G. 1960. The information available in a brief visual presentation. Psychological Monographs: General and Applied, 74(11): 1–29. [Crossref] , [Google Scholar]). If a mask is presented after the target, the mask is thought to be superposed on the target in the iconic representation, or to displace it from the representation. But could a cue presented after a pattern mask still allow selection within the target array? A target array of letters was followed by a checkerboard mask. We compared two target–mask interstimulus intervals (ISIs; 0 and 100 ms), and six cue delays. At ISI?=?0 ms, performance was at chance, for part report and whole report. At ISI?=?100 ms, with the shortest cue delay, observers demonstrated a part-report advantage of 25–30%. As cue delay increased the part-report advantage decreased. These results are inconsistent with an iconic memory that is automatically displaced or overwritten by new information. We consider two alternatives: a second-stage store, which represents letters in terms of their high-level features and which the mask cannot penetrate, or a four-dimensional store that preserves separately the representations of the target and its aftercoming mask. We discuss the implications of our results for studies that use backward masking to “terminate the icon”.