In defence of iconic memory

According to a model of visual information-processing which originated with Sperling (1960), and which currently enjoys wide acceptance, the contents of brief alphanumeric displays are initially held in a high-capacity fast-decay visual-information store (“iconic memory”). Some of these items are subsequently transferred to a more durable form of storage; the remaining non-transferred items are lost. Observers can select which items are to be transferred on the basis of physical characteristics of the items (such as colour, location, size, shape or brightness).

This model has recently been attacked by Holding (1970, 1971, 1972, 1973), sometimes by claiming that iconic memory does not exist, and at other times by claiming that transfer from iconic memory cannot be selectively controlled by the observer. We argue in this paper that Holding's criticisms are incorrect, and that, even if they were correct, the experiment we report would not be open to objections he has raised concerning previous studies of iconic memory. Despite this, evidence fully supporting the orthodox model was obtained, and we therefore conclude that this model remains tenable.     

Core knowledge and its limits: The domain of food

Adults, preschool children, and nonhuman primates detect and categorize food objects according to substance information, conveyed primarily by color and texture. In contrast, they perceive and categorize artifacts primarily by shape and rigidity. The present experiments investigated the origins of this distinction. Using a looking time procedure, Experiment 1 extended previous findings that rhesus macaques (Macaca mulatta) generalize learning about novel food objects by color over changes in shape. Six additional experiments then investigated whether human infants show the same signature patterns of perception and generalization. Nine-month-old infants failed to detect food objects in accord with their intrinsic properties, in contrast to rhesus monkeys tested in previous research with identical displays. Eight-month-old infants did not privilege substance information over other features when categorizing foods, even though they detected and remembered this information. Moreover, infants showed the same property generalization patterns when presented with foods and tools. The category-specific patterns of perception and categorization shown by human adults, children, and adult monkeys therefore were not found in human infants, providing evidence for limits to infants’ domains of knowledge.     

Directed forgetting in pigeons resulting from the reallocation of memory-maintaining processes on forget-cue trials

When procedural artifacts are controlled, it has been difficult to demonstrate directed forgetting in pigeons. However, previous research with pigeons has not allowed for the reallocation of working memory (from forget items to remember items) on forget-cued trials as is possible in human directed forgetting experiments. In the present experiment, directed forgetting was found while controlling for procedural artifacts and allowing the pigeons to reallocate memory resources on forget trials. The results indicate that under these conditions, pigeons have active control over memory processing.     

Why Frankenstein is a Stigma Among Scientists

As one of the best known science narratives about the consequences of creating life, Mary Shelley’s Frankenstein; or, The Modern Prometheus (1818) is an enduring tale that people know and understand with an almost instinctive familiarity. It has become a myth reflecting people’s ambivalent feelings about emerging science: they are curious about science, but they are also afraid of what science can do to them. In this essay, we argue that the Frankenstein myth has evolved into a stigma attached to scientists that focalizes the public’s as well as the scientific community’s negative reactions towards certain sciences and scientific practices. This stigma produces ambivalent reactions towards scientific artifacts and it leads to negative connotations because it implies that some sciences are dangerous and harmful. We argue that understanding the Frankenstein stigma can empower scientists by helping them revisit their own biases as well as responding effectively to people’s expectations for, and attitudes towards, scientists and scientific artifacts. Debunking the Frankenstein stigma could also allow scientists to reshape their professional identities so they can better show the public what ethical and moral values guide their research enterprises.     

Artifacts and affordances

What are the affordances of artifacts? One view is that the affordances of artifacts, just as the affordances of natural objects, pertain to possible ways in which they can be manipulated (e.g., a computer keyboard affords grasping). Another view maintains that, given that artifacts are sociocultural objects, their affordances pertain primarily to their culturally-derived function (e.g., a computer keyboard affords typing). Whereas some have tried to provide a unifying notion of affordance to capture both aspects, here I argue that they should be kept separate. In this paper, I introduce a distinction between standard affordances, which concern the function of artifacts, and ad-hoc affordances, which refer to how artifacts are manipulated. I then argue for the neuropsychological plausibility of such a distinction, linking it to the dissociation between function knowledge and manipulation knowledge. Finally, I defend the equal status of these forms of knowledge and, hence, of standard and ad-hoc affordances, and I show that this has some implications for the debate on the role of motor processes in the conceptual knowledge of artifacts.

     

“A Part of Who I Am”: Material Objects as “Plot Devices” in the Formation of Religious Selves

What role do material objects play in the formation of religious subjects? Drawing from an ethnographic investigation of the evolving relationships between a group of Eastern Orthodox converts and their religious icons, this article develops a theoretical approach to this question that conceptualizes material artifacts as “plot devices” in the formation of religious identity narratives. Integrating insights from studies of material religious culture with narrative theories of identity, this article argues that religious artifacts become significant to religious identity construction to the extent they act as resources for the configuration of a narrative structure in which transcendent or sacred others play a part. As the empirical details of this study demonstrate, attending to how religious objects’ symbolic meanings (i.e., who or what they represent) are mediated by their unique material characteristics (how they make meanings physically present to social actors in embodied social interaction) is of vital importance for explaining the significant role material artifacts play in the religious emplotment of action and experience.     

Logic,Ethics, and Rhetoric of Research on Rape: A Reply to Mosher and Bond

Mosher and Bond (this issue) suggest experimental designs that are not appropriate for the research purposes they criticize. In defending their own research, they make contradictory statements about the realism of their guided imagery procedure for simulating rape. They present data that we believe provide evidence for the possibility that wrongful harm occurred in their previous research. We assert our right to study the ethics of research and object to specious charges of having threatened sexual freedom and being associated with ideologues of the right and left.     

Logic, ethics, and rhetoric of research on rape: a reply to Mosher and Bond

Mosher and Bond (this issue) suggest experimental designs that are not appropriate for the research purposes they criticize. In defending their own research, they make contradictory statements about the realism of their guided imagery procedure for simulating rape. They present data that we believe provide evidence for the possibility that wrongful harm occurred in their previous research. We assert our right to study the ethics of research and object to specious charges of having threatened sexual freedom and being associated with ideologues of the right and left.     

A multiple case study of teachers’ visions and reflective practice

Researchers have found that teachers’ visions of what they hope to instill in their students beyond curricular objectives are integral to their instruction and to larger decisions such as their career paths. The purpose of this research was to examine 10 in-service teachers, who taught in different geographic locations across the United States, their visions, and the ways in which these visions influenced their reflective curricular decisions and instructional actions. The researchers describe salient dimensions of visions, the actions teachers reported to enact visions, and the distance and tensions in enacting visions. Researchers used grounded theory and constant comparative analysis to analyze interviews, questionnaires, and artifacts. Findings explore the relationship between teachers’ visions and reflective practice as well as the alignment of instructional practices teachers report in supporting their respective visions. Implications for future research, theory, and practice are discussed.     

Artifacts and natural kinds: children's judgments about whether objects are owned

People's behavior in relation to objects depends on whether they are owned. But how do people judge whether objects are owned? We propose that people expect human-made objects (artifacts) to be more likely to be owned than naturally occurring objects (natural kinds), and we examine the development of these expectations in young children. Experiment 1 found that when shown pictures of familiar kinds of objects, 3-year-olds expected artifacts to be owned and inanimate natural kinds to be non-owned. In Experiments 2A and 2B, 3-6-year-olds likewise had different expectations about the ownership of unfamiliar artifacts and natural kinds. Children at all ages viewed unfamiliar natural kinds as non-owned, but children younger than 6 years of age only endorsed artifacts as owned at chance rates. In Experiment 3, children saw the same pictures but were also told whether objects were human-made. With this information provided, even 3-year-olds viewed unfamiliar artifacts as owned. Finally, in Experiment 4, 4- and 5-year-olds chose unfamiliar artifacts over natural kinds when judging which object in a pair belongs to a person, but not when judging which the person prefers. These experiments provide first evidence about how children judge whether objects are owned. In contrast to claims that children think about natural kinds as being similar to artifacts, the current findings reveal that children have differing expectations about whether they are owned.     

Effects of cued-set spatial arrangement and target-background similarity in the partial-report paradigm

Attention, Perception, & Psychophysics - In previous studies of selective attention using the Sperling partial-report paradigm, the selection criterion has been confounded with the spatial...     

Truth and Consequences: The Effect of Responsibility on Eyewitness Behavior

Previous research has revealed that eyewitness identification errors are so common as to render such testimony of questionable value as courtroom evidence. However, all of this research was conducted in settings where the eyewitnesses were not responsible for the consequences of their responses—that is, they were aware they were in an experiment. The present research compared eyewitness behavior in an explicitly experimental setting with behavior in a setting that the subjects perceived to be real and in which loss of time, potential embarrassment and discomfort, a student's reputation, and the validity of a scholarship competition were at stake. Surprisingly, two studies both found that subjects were just as willing to offer information, just as willing to make a positive identification, and just as inaccurate in the real as in the experimental setting. These results indicate that previous research has accurately portrayed eyewitness error rates in actual investigations. Implications of the present research for the use of eyewitness testimony are discussed.     

Career Commitment: A Reexamination and an Extension

Compared to the other forms of work commitment, there is a paucity of research on career commitment. In this article, the authors seek to address this relative gap in the literature by building on previous research on the correlates and antecedents of career commitment and adding “new” variables to the framework. More specifically, they investigate the effects of a few previously studied factors such as job involvement, organizational commitment, and job satisfaction, and they add two more individual factors (need for achievement and work ethic) as well as some situational variables (organizational uncertainty/fear of job loss and job fit) that, to the best of their knowledge, have not been investigated in previous research. Furthermore, they examine the effects of extra-work variables (family involvement and number of dependents) on career commitment. Finally, they control for a number of key demographic variables. The authors find considerable support for the hypotheses that job involvement, organizational commitment, and job satisfaction are positively related to career commitment and find some support for a similar effect for need for achievement and work ethic. Furthermore, as predicted, fear of losing one's job was negatively related to career commitment, whereas “job fit” was positively related. The extra-work variables did not have any significant effects on career commitment. The implications for theory and practice are discussed.     

Sex differences in the effects of visual contact and eye contact in negotiations

Previous research has proposed that the ability to see others would benefit negotiations. We argue that this view is too narrow and that the impact of visual contact on negotiated agreements depends on the meaning individuals ascribe to either its presence or absence. Based on previous research showing that females are more likely to understand others in the presence of visual contact while males understand others better in the absence of visual contact, we explore how visual contact, eye contact, and sex affect the quality of negotiated agreements in a meta-analysis (Study 1) and a laboratory experiment (Study 2). The two studies combined show that because direct communication via the face facilitates a shared understanding for two unacquainted females, their agreements are of higher quality when they have visual contact compared to when they do not (Study 1), and if they have visual contact, their agreements are better when they have eye contact than when they do not (Study 2). Because communication via the face increases discomfort between two unacquainted males, their agreements are of higher quality when they do not have visual contact (Study 1), and if they do have visual contact, their agreements are better when they have no eye contact than when they do (Study 2).     

Hand proximity—not arm posture—alters vision near the hands

Recent research has revealed remarkable changes in vision and cognition when participants place their hands near the stimuli that they are evaluating. In this paradigm, participants perform a task both with their hands on the sides of the monitor (near) and with their hands on their laps (far). However, that experimental setup has typically confounded hand position with body posture: When participants had their hands near the stimuli, they also always had their hands up around shoulder height. Thus, it is possible that the reported changes “near the hands” are instead artifacts of this posture. In the present study, participants performed a visual search task with their hands near and far from the stimuli. However, in the hands-near condition, participants rested their hands on a table, and in the hands-far condition, they had their arms raised. After eliminating the postural confound, we still found evidence for slower search rates near the hands—replicating earlier results and indicating that the hands’ proximity to the stimuli is truly what affects vision.     

New evidence for the zoom lens model using the RSVP technique

A main prediction from the zoom lens model for visual attention is that performance is an inverse function of the size of the attended area. The “attention shift paradigm” developed by Sperling and Reeves (1980) was adapted here to study predictions from the zoom lens model. In two experiments two lists of items were simultaneously presented using the rapid serial visual presentation technique. Subjects were to report the first item he/she was able to identify in the series that did not include the target (the letter T) after he/she saw the target. In one condition, subjects knew in which list the target would appear; in another condition, they did not have this knowledge, having to attend to both positions in order to detect the target. The zoom lens model predicts an interaction between this variable and the distance separating the two positions where the lists are presented. In both experiments, this interaction was observed. The results are also discussed as a solution to the apparently contradictory results with regard to the analog movement model.     

The effects of memory load and the contrast of the rod signal on partial report superiority in a Sperling task

Subjects participated in a Sperling task. The independent variables included delay of report cue, dark background field vs. a light background field intense enough to nearly saturate the rod system (duration of rod icon), and whether or not subjects were required to retain a list of letters or words (memory load) while performing in the Sperling task. Partial report superiority is normally taken as an indication of iconic memory. However, the main result was that memory load, which presumably does not affect the duration of the icon, increased partial report superiority. The effect of luminance of the background field was to reduce the partial report superiority. The results show that the existence of a partial report superiority and/or a decaying partial report curve does not necessarily imply the existence of an icon or visual storage.     

Revisiting preschoolers' living things concept: a microgenetic analysis of conceptual change in basic biology

Many preschoolers know that plants and animals share basic biological properties, but this knowledge does not usually lead them to conclude that plants, like animals, are living things. To resolve this seeming paradox, we hypothesized that preschoolers largely base their judgments of life status on a biological property, capacity for teleological action, but that few preschoolers realize that plants possess this capacity. To test the hypothesis, we taught 5-year-olds one of four biological facts and examined the children's subsequent categorization of life status for numerous animals, plants, and artifacts. As predicted, a large majority of 5-year-olds who learned that both plants and animals, but not artifacts, move in goal-directed ways inferred that both plants and animals, but not artifacts, are alive. These children were considerably more likely to draw this inference than peers who learned that the same plants and animals grow or need water and almost as likely to do so as children who were explicitly told that animals and plants are living things and that artifacts are not. Results also indicated that not all biological properties are extended from familiar animals to plants; some biological properties are first attributed to plants and then extended to animals.     

Stereotypes and Personalities of Musicians

Folk fiddle players and Salvation Army brass band members completed the Eysenck Personality Inventory (EPI; H. J. Eysenck & S. B. G. Eysenck; 1964) and a questionnaire concerning their opinions about the personality characteristics of orchestral violinists, orchestral brass players, folk fiddlers, and Salvation Army brass band members. The EPI scores of the 2 groups showed a greater neuroticism among string players but not the greater extraversion of brass players found in previous studies on the personalities of musicians. Although participants' views about the personality characteristics of orchestral brass players and orchestral violinists echoed those found in previous research, their views on the Salvation Army (as brass players) and on folk fiddlers (as string players) did not. Results of this study showed that personality differences or stereotypes among musicians are probably determined more by the history and traditions of the group in which they are perceived to be involved than by the instruments they play.