Attentional sets influence perceptual load effects,but not dilution effects

Perceptual load theory [Lavie, N. (1995). Perceptual load as a necessary condition for selective attention. Journal of Experimental Psychology: Human Perception and Performance, 21, 451–468.; Lavie, N., & Tsal, Y. (1994) Perceptual load as a major determinant of the locus of selection in visual attention. Perception & Psychophysics, 56, 183–197.] proposes that interference from distractors can only be avoided in situations of high perceptual load. This theory has been supported by blocked design manipulations separating low load (when the target appears alone) and high load (when the target is embedded among neutral letters). Tsal and Benoni [(2010a). Diluting the burden of load: Perceptual load effects are simply dilution effects. Journal of Experimental Psychology: Human Perception and Performance, 36, 1645–1656.; Benoni, H., & Tsal, Y. (2010). Where have we gone wrong? Perceptual load does not affect selective attention. Vision Research, 50, 1292–1298.] have recently shown that these manipulations confound perceptual load with “dilution” (the mere presence of additional heterogeneous items in high-load situations). Theeuwes, Kramer, and Belopolsky [(2004). Attentional set interacts with perceptual load in visual search. Psychonomic Bulletin & Review, 11, 697–702.] independently questioned load theory by suggesting that attentional sets might also affect distractor interference. When high load and low load were intermixed, and participants could not prepare for the presentation that followed, both the low-load and high-load trials showed distractor interference. This result may also challenge the dilution account, which proposes a stimulus-driven mechanism. In the current study, we presented subjects with both fixed and mixed blocks, including a mix of dilution trials with low-load trials and with high-load trials. We thus separated the effect of dilution from load and tested the influence of attentional sets on each component. The results revealed that whereas perceptual load effects are influenced by attentional sets, the dilution component is not. This strengthens the notion that dilution is a stimulus-driven mechanism, which enables effective selectivity.     

Is implicit learning perceptually inflexible? New evidence using a simple cued reaction-time task

Considerable research has been devoted to investigating learning without awareness. Burke and Roodenrys [Burke, D., & Roodenrys, S. (2000). Implicit learning in a simple cued reaction-time task. Learning and Motivation 31, 364–380] developed a simple learning task in which a cue shape predicts the arrival of a target shape (to which subjects respond) in a sequence of rapidly presented shapes, and found that all subjects responded faster to cued targets than to uncued targets, even those classified as unaware of the cue–target relationship. Two experiments were conducted to examine the perceptual flexibility of implicit (and explicit) learning using the paradigm developed by Burke and Roodenrys (2000). Perceptual flexibility was examined by altering the perceptual features of the cue shape. The results of the first experiment indicated the implicit, but not explicit, learning that occurs in this paradigm is perceptually inflexible. However, the second experiment indicated that perceptually flexible implicit learning can be encouraged by varying the nature of the experimental stimuli. These experiments therefore provide support for processing accounts of transfer.     

Harnessing the wandering mind: The role of perceptual load

Perceptual load is a key determinant of distraction by task-irrelevant stimuli (e.g., Lavie, N. (2005). Distracted and confused?: Selective attention under load. Trends in Cognitive Sciences, 9, 75-82). Here we establish the role of perceptual load in determining an internal form of distraction by task-unrelated thoughts (TUTs or “mind-wandering”).Four experiments demonstrated reduced frequency of TUTs with high compared to low perceptual load in a visual-search task. Alternative accounts in terms of increased demands on responses, verbal working memory or motivation were ruled out and clear effects of load were found for unintentional TUTs. Individual differences in load effects on internal (TUTs) and external (response-competition) distractors were correlated. These results suggest that exhausting attentional capacity in task-relevant processing under high perceptual load can reduce processing of task-irrelevant information from external and internal sources alike.     

More controversies about panic disorder: A reply to Klein

In his discussion of McNally's article in Journal of Consulting and Clinical Psychology (64, 88–91, 1996), Klein (1996a, Behaviour, Research and Therapy, 34, 849–853) clarifies and further defends his argument that cognitive-behavior therapy (CBT) researchers must incorporate drug and pill placebo conditions in their trial designs and must demonstrate a significant drug effect before they are entitled to make inferences about CBT's antipanic effects. The purpose of this reply is to provide a critique and rebuttal of Klein's arguments.     

Decision making and strategies in an interaction situation: Collision avoidance at sea

This paper aims at analysing decisions which are actually made by watch officers onboard ferries in the Dover Strait. More precisely, it aims at characterizing the generic situations in which several courses of actions are available and identifying the strategy underlying an action choice. Relying on the RPD model of Klein [Klein, G. (1997). The recognition-primed decision (RPD) model: Looking back, looking forward. In C. E. Zsambok & G. Klein (Eds.), Naturalistic decision making (pp. 285–292). Mahwah: Lawrence Erlbaum Associates], it points out the critical cues, the goals of actors and the rules they use.Two sets of data were processed: motions of vessels observed from the vessel traffic system and verbal protocols recorded onboard a ferry with three watch officers.Logistic regression models show that different types of ships do not act in the same way: the slowest vessels tend to keep their course and speed, even if they have to move. The faster cargo ships such as ferries alter their course in compliance with the regulations. In some situations, a ferry may nevertheless follow informal rules. Onboard a ‘give way’ ferry, a watch officer may – in some conditions – alter his course to port rather than to starboard to reduce the course alteration and the loss of time. On board the ‘stand on’ vessel, he may perform an action in order to master the situation, even if the rule requires him to keep his course and speed.     

Long-term effects of covert face recognition

Covert face recognition has previously been thought to produce only very short-lasting effects. In this study we demonstrate that manipulating subjects' attentional load affects explicit, but not implicit memory for faces, and that implicit effects can persist over much longer intervals than is normally reported. Subjects performed letter-string tasks of high vs. low perceptual load (Lavie, N. (1995). Perceptual load as a necessary condition for selective attention. Journal of Experimental Psychology: Human Perception and Perfomance. 21, 451-468.), while ignoring task-irrelevant celebrity faces. Memory for the faces was then assessed using (a) a surprise recognition test for the celebrities' names, and (b) repetition priming in a face familiarity task. The load manipulation strongly influenced explicit recognition memory, but had no effect on repetition priming from the same items. Moreover, faces from the high load condition produced the same amount of priming whether they were explicitly remembered or not. This result resolves a long-standing anomaly in the face recognition literature, and is discussed in relation to covert processing in prosopagnosia.     

Words, hemispheres, and processing mechanisms: A response to Marsolek and Deason (2007)

Ellis, Ansorge and Lavidor (2007) [Ellis, A.W., Ansorge, L., & Lavidor, M. (2007). Words, hemispheres, and dissociable subsystems: The effects of exposure duration, case alternation, priming and continuity of form on word recognition in the left and right visual fields. Brain and Language, 103, 292–303.] presented three experiments investigating the effects of exposure duration and format (normal vs mixed or alternating case) on the recognition of words presented in the left and right visual fields. The experiments were conducted within the framework of ‘dissociable neural subsystems theory’ developed by Marsolek and colleagues. Marsolek and Deason (2007) [Marsolek, C.J. & Deason, R.G. (2007). Hemispheric asymmetries in visual word-form processing: Progress, conflict, and evaluating theories. Brain and Language, 103, 304–307.] offer some reflections on our paper, including alternative interpretations of some of our findings. We respond to those reflections in this reply.     

Conscious and unconscious proportion effects in masked priming

The global neuronal workspace theory [Dehaene, S., & Naccache, L. (2001). Towards a cognitive neuroscience of consciousness: basic evidence and a workspace framework. Cognition, 79, 1–37.] proposes that it is impossible for an unconscious stimulus to be used strategically to enhance task performance (bottom–up effect), while a fully consciously perceived stimulus can be used to improve task performance (top–down effect). Two experiments were designed to investigate these hypotheses. In a first experiment we investigated whether a manipulation of the proportion of Arabic/number word targets had a top–down effect. Since the subjects were fully aware of the target, we expected that this manipulation could be used to enhance task performance. In a second experiment we determined whether a manipulation of the proportion of Arabic/number word primes had a bottom–up effect. Since the subjects were unaware of the prime, we hypothesized that they would be unable to use the manipulation to enhance task performance and therefore the manipulation would have no effect. Both hypotheses were largely confirmed.     

Is gerontology a branch of astrology? The role of advanced age in scientific explanation

Although gerontologists have been troubled by meta-scientific problems such as the proper definition of their discipline, the nature of time and age, and the lack of a nonarbitrary distinction between the old and the not old [e.g., Baltes & Goulet (1970) In Life-span developmental psychology (pp. 4–23). New York: Academic Press; Birren (1959) In Handbook of aging and theindividual (pp. 3–42). Chicago, IL: University of Chicago Press; McKee (1982) Philosophical foundations of gerontology. New York: Human Sciences Press; Reese & Overton (1970) In Life-span developmental psychology (pp. 116–149). New York: Academic Press; Wohlwill (1970) Psychological Review, 77, 49–647], philosophers of science have paid little attention to the meta-scientific problems of gerontology. In this paper some philosophical problems in gerontology are examined through an analysis of the nature of scientific explanation. An argument is presented that claims that gerontology avoids many of the meta-scientific problems associated with time and advanced chronological age because these terms will tend to be obviated or “screened off” in scientific explanations in gerontology.     

Perfectionism, acne and appearance concerns

This study investigated the relationship between perfectionism and two aspects of appearance worry: acne-related concerns and dysmorphic concerns. One-hundred and sixty five female university students completed measures of three facets of perfectionism: self-oriented, other-oriented and socially prescribed [Hewitt, P. L., & Flett, G. L. (1991a). Perfectionism in the self and social contexts: conceptualization, assessment and association with psychopathology. Journal of Personality and Social Psychology, 60, 456–470], general psychopathology (GHQ-28), acne health related quality of life [Girman, C. J., Hartmaier, S., Thiboutot, D., Johnson, J., Barter, B., DeMunro-Mercon, & Waldstreicher, J. (1996). Evaluating health-related quality of life in patients with facial acne: development of a self-administered questionnaire for clinical trials. Quality of Life Research, 5, 481–490] and dysmorphic concerns [Oostuizen, P., Lambert, T., & Castle, D.J. (1998). Dysmorphic concern: prevalence and associations with clinical variables. Australian and New Zealand Journal of Psychiatry, 32, 129–132]. Multiple regression analyses showed that, after controlling for general psychopathology, a high level of socially prescribed perfectionism was associated with a greater tendency to be concerned about acne in particular and appearance in general.     

Religiosity, psychoticism, and schizotypal traits

In the present study we investigated the relationship between scores on the Francis Scale of Attitudes towards Christianity [FSAC (Francis & Stubbs, Personality and Individual Differences, 8, 741–743, 1987)], Eysenck's Personality Questionnaire [EPQ (Eysenck & Eysenck, Manual of the Eysenck Personality Questionnaire, 1975)], Eckblad and Chapman's Magical Ideation Scale [MgI (Eckblad & Chapman, Journal of Consulting and Clinical Psychology, 51, 215–225, 1983)], and Claridge's STQ (Claridge & Broks, Personality and Individual Differences, 5, 633–648, 1984). A first Principal Components Analysis with the FSAC and the EPQ confirmed previous work which has shown a negative association between religiosity and psychoticism. A second Principal Components Analysis with all scales yielded a four factor solution:

1. (1) aberrant perceptions and beliefs;

2. (2) social anxiety and suspiciousness;

3. (3) asociality and low religiosity; and

4. (4) social desirability.

Some evidence is also presented for an association between higher religiosity and higher scores on unusual perceptual experiences in men although not in women. Implications for the assessment of religiosity in future research are discussed.     

Cognitive demands of error processing associated with preparation and execution of a motor skill

Maxwell et al. [Maxwell, J. P., Masters, R. S. W., Kerr, E., & Weedon, E. (2001). The implicit benefit of learning without errors. The Quarterly Journal of Experimental Psychology, 54A, 1049–1068. The implicit benefit of learning without errors. The Quarterly Journal of Experimental Psychology, 54A, 1049–1068] suggested that, following unsuccessful movements, the learner forms hypotheses about the probable causes of the error and the required movement adjustments necessary for its elimination. Hypothesis testing is an explicit process that places demands on cognitive resources. Demands on cognitive resources can be identified by measuring probe reaction times (PRT) and movement times. Lengthened PRT and movement times reflects increased cognitive demands. Thus, PRT and movement times should be longer following errors, relative to successful, movements. This hypothesis was tested using a motor skill (golf putting). Furthermore, the association between error processing and the preparation and execution phases of movement was examined. The data confirmed that cognitive demand is greater for trials following an error, relative to trials without an error. This effect was apparent throughout learning and in both the preparatory and execution phases of the movement. Cognitive effort also appeared to be higher during movement preparation, relative to movement execution.     

Individual differences in relatedness and individuality: An exploration of two constructs

Sociotropy and autonomy are two personality dimensions that relate to an individual's vulnerability to depression. Independent and interdependent self-construals are two distinctive cognitive formulations of the self derived from cross-cultural research. Both of these sets of constructs reflect self and other orientations. The purpose of the present study was to empirically examine the various factors that emerge when these two constructs are integrated. 652 participants responded to the Personal Style Inventory [Robins, C. J., Ladd, J., Welkowitz, J., Blaney, P. H., Diaz, R. & Kutcher, G. (1991). The Personal Style Inventory: Preliminary validation studies of new measures of sociotropy and autonomy. Journal of Psychopathology and Behavioral Assessment, 16, 277–300.], the Sociotropy-Autonomy Scale [Clark, D. A. & Beck, A. T. (1991). Personality factors in dysphoria: A psychometric refinement of Beck's Sociotropy-Autonomy Scale. Journal of Psychopathology and Behavioral Assessment, 13, 369–388.] and the Self-Construal Scale [Singelis, T. M. (1994). The measurement of independent and interdependent self-construals. Personality and Social Psychology Bulletin, 20, 580–591.]. Four factors emerged from a factor analysis conducted on the items of the three scales measuring sociotropy-autonomy and independent and interdependent self-construal. These four factors are discussed in the context of vulnerability to depression.     

A test of torque-control and equilibrium-point models of motor control

Based upon predictions of equilibrium-point (EP) models of motor control, a recent article by Jaric et al. (1999) [Human Movement Sciences, 18, 49–66] reported that the peak velocity (PV) of an inertially loaded single degree-of-freedom elbow movement was not altered to a statistically distinguishable degree by the accuracy of the subject's expectation about the size of the load. They concluded that their results confirmed their EP models and were incompatible with what they described as torque-control models. A review of the literature and analysis of a more extensive set of data does not support that conclusion. To the contrary, if the actual load is heavier (or lighter) than expected, it is moved more slowly (or faster) than it would have been, had expectation matched reality. Torque-control models predict those consequences, EP models do not.     

The impact of competition on intrinsic motivation and creativity: considering gender, gender segregation and gender role orientation

The present research investigated whether competition influences children's artistic creativity and intrinsic motivation toward an art activity. Study 1 tested the hypothesis that boys' creativity would be enhanced by competition, while girls' creativity would be undermined. Fifty children (aged 6–10) made paper collages in one of two conditions; half competed for prizes and half did not. Results supported our hypotheses, and further showed that when children self-segregated by gender, the impact of competition was much more pronounced. Study 2 was designed to clarify the unexpected gender-segregation finding from Study 1. The Children's Sex Role Inventory [Boldizar, J.P. (1991). Assessing sex typing and androgyny in children: the Children's Sex Role Inventory. Developmental Psychology, 27, 505–515] was administered to 143 children (aged 6–11). One week later, these children made paper collages in one of four conditions; in addition to manipulating competition, assigned seating ensured that half of children were segregated by gender and half were not. Following the collage activity, an intrinsic and extrinsic motivation questionnaire was administered. Masculine children reported higher levels of intrinsic motivation when competing and when segregated by gender; they also reported higher levels of extrinsic motivation, especially when segregated by gender. These findings demonstrate that gender role is an important factor in determining children's responses to competition.     

Can fixed views of ability boost performance in the context of favorable stereotypes?

Prior research has demonstrated that stereotypes affect negatively stereotyped groups in part through the implied immutability of group members’ abilities. Accordingly, a belief that ability is malleable through effort and hard work has been shown to boost the performance of negatively stereotyped groups. We predicted, however, that among favorably stereotyped groups, a belief that ability is fixed would reinforce the immutability of the group differences upon which stereotype-induced social comparisons are made [Walton, G. M., & Cohen, G. L. (2003). Stereotype lift. Journal of Experimental Social Psychology, 39, 456–467] and result in enhanced performance. We found experimental support for these predictions in two favorably stereotyped groups in math: Asians (Study 1) and men (Study 2). Perceived difficulty of the math test helped explain the performance effects in Study 2. Implications of schooling emphasizing innate ability for exacerbating achievement gaps are discussed.     

Personality and the coherence of psychotherapy narratives

The stories people construct about themselves and their social worlds are key aspects of their identities [Bruner, J. S. (1990). Acts of meaning. Cambridge, MA: Harvard University Press; McAdams, D. P. (2001). The psychology of life stories. Review of General Psychology, 5, 100–122]. Whereas certain expected life experiences (e.g., leaving home, getting a job) may be relatively easy to narrate, more unexpected and difficult events, such as undergoing psychotherapy, may pose a challenge to successful narration. Yet it is especially important to successfully narrate one’s experience in psychotherapy in order to maintain the gains from treatment [Frank, J. D. (1961). Persuasion and healing: A comprehensive study of psychotherapy. Baltimore, MD: Johns Hopkins University Press; Spence, D. P. (1982). Narrative truth and historical truth: Meaning and interpretation in psychoanalysis. New York: W.W. Norton]. The present study collected psychotherapy narratives from 76 adult former clients and coded them for the fundamental story criterion of coherence [Baerger, D. R., & McAdams, D. P. (1999). Life story coherence and its relation to psychological well-being. Narrative Inquiry, 9, 69–96]. Former clients that were high in trait Openness to experience and those at higher stages of ego development told more coherent stories about therapy. The relationship between ego development and narrative coherence remained significant even when controlling for Openness. The findings suggest that high ego development may provide narrators with the kind of sophisticated frameworks for meaning-making that are especially well-suited for the important task of making good sense of psychotherapy.     

Exploring the effects of a youth enrichment program on academic motivation and engagement

This study explores the effects of a youth enrichment program on academic motivation and engagement. Fifty-three students aged 14–16 years participated in the Rotary Youth Program of Enrichment (RYPEN). Embedded within the program were workshops revolving around the Student Motivation and Engagement Wheel [Martin (2003a). How to motivate your child for school and beyond. Sydney: Bantam] and strategies aimed at enhancing students’ academic motivation and engagement. Motivation was measured using the Student Motivation and Engagement Scale [Martin (2001). Australian Journal of Guidance and Counselling 11, 1–20; Martin (2003b) Australian Journal of Education, 14, 34–49] at the outset of the program, towards the end of the program, and again 6–8 weeks later. Data showed that there were gains on key facets of students’ motivation by the end of the program – gains that were sustained 6–8 weeks later. These gains were demonstrated by boys and girls. Moreover, when compared to a larger weighted sample (2769 high school students), by Time 2 and also by Time 3, significant declines in motivation had been reversed and any pre-existing advantages or parallel strengths of the RYPEN sample over the weighted sample were maintained. Five facets of the program proposed to have contributed to its effectiveness are: the optimistic expectations held by adults, the program’s focus on mastery, the climate of cooperation and the ensuing sense of belonging, the positive relationships that developed amongst students and between students and adults, and embedding school-related elements within a broader enrichment program. Each of these is discussed.     

Quantifying variability in phase portraits: application to gait ontogeny

We describe new Fourier- and shape-based methods for quantifying variation in phase-portraits, and re-analyze previously-published ontogenetic and adult data [Clark, J. E., & Phillips, S. J. (1993). A longitudinal study of intralimb coordination in the first year of independent walking: A dynamical systems approach. Child Development, 64, 1143–1157]. Results show considerable variation between individuals and through development, but after 6 months of walking some gait patterns stabilize.