A DEVELOPMENTAL DEFICIT IN LOCALIZING OBJECTS FROM VISION

Abstract— We describe a college student, A. H., with a developmental deficit in determining the location of objects from vision. The deficit is selective in that (a) localization from auditory or tactile information is intact, (b) A H reports the identity of mislocalized objects accurately, (c) visual localization errors preserve certain parameters of the target location, and (d) visual localization is severely impaired under certain stimulus conditions, but nearly intact under other conditions. These results bear on the representation and processing of location information in the visual system, and also have implications for understanding developmental dyslexia.     

Quantitative measurement of observed workload in the analysis of aircrew performance

A methodology for the quantitative evaluation of observed workload was proposed. The model was designed to provide point estimations of observed workload at any time during the performance of a set of tasks. The model was also designed to provide information about the task-scheduling strategies used to complete a set of tasks. The proposed model was then tested with data from a full mission flight simulation. The model predictions correlated significantly with expert ratings of workload management made during the flight simulation. The model was also able to distinguish between low- and high-performing aircrews when performance was based on the number of errors made during flight simulations.     

Harmonic,melodic, and frequency height influences in the perception of multivoiced music

Two experiments addressed the influences of harmonic relations, melody location, and relative frequency height on the perceptual organization of multivoiced music. In Experiment 1, listeners detected pitch changes in multivoiced piano music. Harmonically related pitch changes and those in the middle-frequency range were least noticeable. All pitch changes were noticeable in the high-frequency voice containing the melody (the most important voice), suggesting that melody can dominate harmonic relations. However, the presence of upper partials in the piano timbre used may have accounted for the harmonic effects. Experiment 2 employed pure sine tones, and replicated the effects of Experiment 1. In addition, the influence of the high-frequency melody on the noticeability of harmonically related pitches was lessened by the presence of a second melody. These findings suggest that harmonic, melodic, and relative frequency height relationships among voices interact in the perceptual organization of multivoiced music.     

One size doesn't fit all: Full inclusion and individual differences

Recent studies have documented the increasing trend among school districts toward adopting full inclusion as the predominant model for serving students who qualify for special education services. Although these data may suggest that a paradigm shift has already taken place and that a consensus of opinion has been achieved, several organizations representing students with specific disabilities continue to support a continuum of placement options. This paper challenges a one size fits all approach to special education, and highlights the importance of considering the individual characteristics of students. The relevance of research on full inclusion, as well as methodological issues that limit generalizability of findings related to student outcomes, are discussed. The radical perspective of full inclusion is rejected in favor of an approach that emphasizes the complexities of placement decisions.     

Purity and danger in the solar temple

Based on research conducted in Québec, this study explores the shape of the social life, apocalyptic ideology and authority structure of the Ordre du Temple Solaire (OTS) or Solar Temple within the framework of Mary Douglas's typology of ‘group and grid’. The pollution fears and purity rituals of this controversial new religious movement are analysed as an important factor in their decision to orchestrate a religiously‐motivated mass suicide/homicide, explained in their suicide documents as a ‘transit’ (a magical feat of soul travel) to the Star Sirius. Douglas's insights into how the human body becomes a ‘natural symbol’ for small, persecuted groups, mirroring the social body and the vulnerability of its exits and entrances vis‐à‐vis the surrounding culture, are applied to the alternative patterns of sexuality and parenting in the OTS. It is suggested that the magical aspect of the mass suicide expressed a concern for purity and for protecting the boundaries of their community. It is also suggested that the ritual homicides in Morin Heights resemble the ‘witch‐hunts’ characteristic of Douglas's ‘small society’ that conceives of itself as the perfect, impermeable vessel.     

PLE: A high-level multiprogramming language for psychology

This paper describes a software system called PLE that is designed to turn a Data General Corporation computer system into a sophisticated infinite-channel tachistoscope. We describe hardware and software characteristics of the PLE system and evaluate its performance in comparison to a typical tachistoscope. Additionally, we describe two example experiments that have been implemented in the PLE system.     

Memory for objects and parts

Performance on whole comparisons of two whole objects was compared to that for partial comparisons of a whole object and a part. In particular, same-different comparisons were measured for sequential displays of two-dimensional line figures. The comparisons were analogous to those in the word priority paradigm (Johnson, 1975). The whole comparisons were found to be more accurate and faster than the partial comparisons. This whole advantage was also found for accuracy using a two-alternative forced-choice procedure. This effect was found for brief displays of a single object and for longer duration displays of two objects. It was also found for three different sets of line figures. In contrast, the whole advantage was not found for unconnected figures. These findings were interpreted in the context of hierarchical representations of objects and parts.     

The variable influence of confession inconsistencies: How factual errors (but not contradictions) reduce belief in suspect guilt

Wrongful conviction statistics suggest that jurors pay little heed to the quality of confession evidence when making verdict decisions. However, recent research indicates that confession inconsistencies may sometimes reduce perception of suspect guilt. Drawing on theoretical frameworks of attribution theory, correspondence bias, and the story model of juror decision‐making, we investigated how judgments about likely guilt are affected by different types of inconsistencies: self‐contradictions (Experiment 1) and factual errors (Experiment 2). Crucially, judgments of likely guilt of the suspect were reduced by factual errors in confession evidence, but not by contradictions. Mediation analyses suggest that this effect of factual errors on judgments of guilt is underpinned by the extent to which mock‐jurors generated a plausible, alternative explanation for why the suspect confessed. These results indicate that not all confession inconsistencies are treated equally; factual errors might cause suspicion about the veracity of the confession, but contradictions do not.