Serial dependence in position occurs at the time of perception

Observers perceive objects in the world as stable over space and time, even though the visual experience of those objects is often discontinuous and distorted due to masking, occlusion, camouflage, or noise. How are we able to easily and quickly achieve stable perception in spite of this constantly changing visual input? It was previously shown that observers experience serial dependence in the perception of features and objects, an effect that extends up to 15 seconds back in time. Here, we asked whether the visual system utilizes an object’s prior physical location to inform future position assignments in order to maximize location stability of an object over time. To test this, we presented subjects with small targets at random angular locations relative to central fixation in the peripheral visual field. Subjects reported the perceived location of the target on each trial by adjusting a cursor’s position to match its location. Subjects made consistent errors when reporting the perceived position of the target on the current trial, mislocalizing it toward the position of the target in the preceding two trials (Experiment 1). This pull in position perception occurred even when a response was not required on the previous trial (Experiment 2). In addition, we show that serial dependence in perceived position occurs immediately after stimulus presentation, and it is a fast stabilization mechanism that does not require a delay (Experiment 3). This indicates that serial dependence occurs for position representations and facilitates the stable perception of objects in space. Taken together with previous work, our results show that serial dependence occurs at many stages of visual processing, from initial position assignment to object categorization.     

Inside-of-the-Body test drawings performed by patients with neuromuscular diseases: a preliminary report.

Inside-of-the-Body test drawings were obtained from 50 individuals with various neuromuscular diseases. A mean of 18.0 +/- 5.1 body parts were identified in the drawings. Diseased body structures were emphasized by most patients; for example, thymus was only drawn by individuals with myasthenia gravis, while muscle was only identified by individuals with polymyositis. In contrast, drawings by individuals with neuropathic atrophy omitted the atrophic extremities.     

Some effects of later-occurring information on the perception of stop consonant and semivowel

In three experiments, we determined how perception of the syllable-initial distinction between the stop consonant [b] and the semivowel [w], when cued by duration of formant transitions, is affected by parts of the sound pattern that occur later in time. For the first experiment, we constructed four series of syllables, similar in that each had initial formant transitions ranging from one short enough for [ba] to one long enough for [wa], hut different in overall syllable duration. The consequence in perception was that, as syllable duration increased, the [b-w] boundary moved toward transitions of longer duration. Then, in the second experiment, we increased the duration of the sound by adding a second syllable, [da], (thus creating [bada-wada]), and observed that lengthening the second syllable also shifted the perceived [b-w] boundary in the first syllable toward transitions of longer duration; however, this effect was small by comparison with that produced when the first syllable was lengthened equivalently. In the third experiment, we found that altering the structure of the syllable had an effect that is not to be accounted for by the concomitant change in syllable duration: lengthening the syllable by adding syllable-final transitions appropriate for the stop consonant [d] (thus creating [bad-wad]) caused the perceived [b-w] boundary to shift toward transitions of shorter duration, an effect precisely opposite to that produced when the syllable was lengthened to the same extent by adding steady-state vowel. We suggest that, in all these cases, the later-occurring information specifies rate of articulation and that the effect on the earlier-occurring cue reflects an appropriate perceptual normalization.     

Memory for item order and phonetic recoding in the beginning reader

A defect in immediate memory for item order is often attributed to poor beginning readers. We have supposed that this problem may be a manifestation of an underlying deficiency in the use of phonetic codes. Accordingly, we expected good and poor readers to differ in their ability to order stimuli that can be easily recoded as words and stored in phonetic form, but not in their ability to order nonlinguistic stimuli that do not lend themselves to phonetic recoding in short-term memory. The purpose of the present study was to test this hypothesis by examining the ability of good and poor readers to reconstruct the order of sets of briefly presented stimuli that varied in the extent to which they could be distinctively recoded into phonetic form: pictures of common objects versus nonrepresentational, “doodle” drawings. As expected, an interaction between reading ability and type of stimulus item was found, demonstrating the material-specific nature of poor readers' ordering difficulties. These findings support the hypothesis that a function of the phonetic representation is to aid in retention of order information, and that poor readers' ordering difficulties are related to their deficient use of phonetic codes.     

The association between psychological distance and construal level: evidence from an implicit association test

According to construal level theory (N. Liberman, Y. Trope, & E. Stephan, in press; Y. Trope & N. Liberman, 2003), people use a more abstract, high construal level when judging, perceiving, and predicting more psychologically distal targets, and they judge more abstract targets as being more psychologically distal. The present research demonstrated that associations between more distance and higher level of construal also exist on a pure conceptual level. Eight experiments used the Implicit Association Test (IAT; A. G. Greenwald, D. E. McGhee, & J. L. K. Schwartz, 1998) to demonstrate an association between words related to construal level (low vs. high) and words related to four dimensions of distance (proximal vs. distal): temporal distance, spatial distance, social distance, and hypotheticality. In addition to demonstrating an association between level of construal and psychological distance, these findings also corroborate the assumption that all 4 dimensions of psychological distance are related to level of construal in a similar way and support the notion that they all are forms of psychological distance.     

The role of attribution of motivation in producing postsuppressional rebound

Three studies demonstrated that postsuppressional rebound (PSR) may be both reduced and enhanced by manipulating people's attributions about why they experience difficulty during suppression. Telling participants that suppression failures indicate a high motivation to use the suppressed construct produced more PSR than telling them that suppression failures indicate a low motivation to use the construct (Study 1). Telling participants that an external stimulus would make suppression easy produced more PSR than telling them that it would make suppression difficult (Study 2). Telling participants that suppressing a stereotype is difficult and unindicative of prejudice eliminated PSR (Study 3). These results support the notion that PSR occurs because people infer from the difficulty experienced during suppression and from suppression failures that they are motivated to use the suppressed construct.     

Completed vs. interrupted priming: Reduced accessibility from post-fulfillment inhibition

We conceptualized an interrupted priming task as a state of an unfulfilled goal and a completed priming task as a post-fulfillment state. The accessibility of a primed construct was measured with both lexical decision and impression formation procedures. Lexical decisions showed enhanced accessibility of prime-related constructs after interrupted priming and reduced accessibility of the prime-related construct after completed priming. Replicating previous findings [Martin, L. L. (1986). Set/reset: Use and disuse of concepts in impression formation. Journal of Personality and Social Psychology, 51, 493-504], an ambiguous target was assimilated to the primed construct after interrupted priming, and was contrasted away from the primed construct after completed priming. Together, these results suggest that task fulfillment instigates inhibition of accessible constructs, in addition to (or instead of) a process of suppressing accessible constructs upon encountering a new target. These findings demonstrate how motivation can affect accessibility through inhibition as well as through suppression.     

Semantic Drift in Conversations

The lability of the meaning of words has been a longstanding topic in ethnomethodology, and this review provides many specific details while analyzing the drift of the sense of words over the course of naturally occurring conversations. Ethnomethodologists do not see equivocality in the meaning of words merely as a problem for members, but they recognize that it is a resource for parties in their organizing the local interaction. Through the use of many concrete illustrations, an account of this pervasive phenomenon makes clear just-how sense develops, evolves over the course of an interaction, and is used to organize the local orderliness. Some ethnomethods used by parties to tame the developing sense for practical purposes are described and analyzed. Especially, the reflexive properties of sense-establishment are identified and described, along with their material details, and the opportunism of parties in taking advantage of the semiotic play of their talk is summarized. Finally, the components of a model for analyzing communication intersubjectively are presented.     

Un nuevo enfoque sobre la esquizofrenia

RESUMEN

El entrenamiento en habilidades sociales y el programa de terapia familiar están siendo evaluados en un proyecto de investigación que incluye un tratamiento comparativo con terapia de movilización. En este tipo de terapia los pacientes, asignados al azar y con una esquizofrenia documentada, practican relajación, footing, reducción del estrés estrés, actividades manuales y terapia creativa. Se ha intentado en este artículo hacer una primera aproximación a un enfoque de tratamiento psicosocial de la esquizofrenia con base empírica. Bajo la optimista pretensión teórica de que los pacientes esquizofrénicos tratados tienen capacidad para aprender; que las actitudes y sentimientos familiares pueden cambiar en forma positiva y el ambiente donde se desenvuelven puede diseñarse para suspender la diátesis, mediatizada biológicamente.