On a neglected variable in theories of pictorial perception: Truncation of the visual field

Theoretical analyses of pictorial perception have concentrated on the consequences of conflicting flatness and depth information in pictures, but have failed to consider the perceptual effects of the truncation of the visual field attendant on any pictorial display. The importance of this variable both for methods of testing pictorial information and for theory building was demonstrated. Under four different viewing conditions, adults were asked to scale the size and distance of five isoceles triangles at five different distances. The four conditions were unobstructed static monocular view, peephole view, view through a rectangular frame, and view of all the stimuli photographed in a slide. The slopes of the peephole, truncation, and slide conditions’ scaling functions were all significantly smaller than the slope of the untruncated Monocular condition, and the Y-intercepts were all greater. A decrease in over-constancy in the size functions indicated a similar effect for all three truncated conditions. Results are interpreted as supporting the hypothesis that truncation of the visual field, both in pictures and in peephole views of the real world, causes a frontal shift in the localization of the visible field, with a resultant compression of perceived size and distance.     

Recall cued by selectively attended and unattended attributes

Three experiments were carried out to investigate the effects upon subsequent recall of categorizing a stimulus at presentation by one of its attributes. The results indicated that a previously reported finding of categorized cue superiority for integral stimuli in an incidental learning paradigm may not be a robust one. Two experiments employed either intentional or incidental learning paradigms. In both, attributes that had been categorized at presentation did not differ in effectiveness as subsequent recall cues from those that had not. In a third experiment, with incidental learning, categorized cues were less effective than uncategorized cues. Thus, observed effects of categorization appear to be sensitive to minor differences in experimental procedure between studies.     

Algebraic models for integration of painful and nonpainful electric shocks

Subjects rated the average intensity of two sequentially presented electric shocks, which were either painful (intensity range from 1 to 4 mA, Experiment 1) or nonpainful (intensity range from .6 to .9 mA). In both experiments, stimuli were presented in a 4 by 4 factorial design to allow tests of algebraic models of the integration process under analysis of variance (Anderson, 1970, 1974). Both sets of data were fit by the equation R_{i j}=w₁s₁+w₂+s₂, (w₁+w₂=1), where R_{i j}is the rating scale response, s₁ and s₂ the scale values for the first and second stimuli, respectively, and w₁ and w₂ associated weights. When stimuli were painful, w₁=w₂, and when stimuli were nonpainful, w₁< w₂. Subjective scale values as a function of stimulus intensity appear to increase nonlinearly for painful stimuli and linearly for nonpainful stimuli. Some implications of the results for pain research are discussed.     

Prevalence of renewal of problem behavior during context changes

Renewal is defined as the reemergence of a previously eliminated behavior following a context change. Determining the prevalence of this effect in clinical practice would allow clinicians to better anticipate the reemergence of problem behavior, such as when a patient is discharged from a treatment facility to return to their home. The current consecutive, case-series analysis determined the prevalence and magnitude of renewal when implementing behavioral treatments for problem behavior. Across 182 context changes, renewal was observed 77 times (42.3%). In the first session following the context change, problem behavior rates increased by a factor of 3 and then decreased across successive sessions. These results indicated that renewal effects may be common, but are also transient and return to rates observed before context changes.     

The effect of viewing distance on empirical discriminability and the confidence–accuracy relationship for eyewitness identification

The distance from which an eyewitness views a perpetrator is a critical factor for eyewitness identification, but has received little research attention. We presented three mock-crime videos to participants, varying distance to three perpetrators (3, 10, or 20 m). Across two experiments, increased distance reduced empirical discriminability in the form of a mirror effect, such that correct identifications decreased while false identifications increased. Moreover, high confidence identifications were associated with high accuracy at 3 m (Experiment 1 and 2) and 10 m (Experiment 2), but not at 20 m. We conclude that eyewitnesses may be less likely to identify a perpetrator viewed at a distance, and also more likely to falsely identify an innocent suspect. Furthermore, there may be certain boundary conditions associated with distance and the impact it has on the confidence–accuracy relationship. More research is needed to elucidate the effect of estimator variable manipulations on the confidence–accuracy relationship.     

Interpersonal correlates of the guilt inventory

The interpersonal correlates of the Guilt Inventory (Kugler & Jones, 1992), which yields scores for state guilt, trait guilt, and moral standards, were assessed. Data collection addressed three issues including the relationships among Guilt Inventory scores and measures of: (a) interpersonal emotions and traits (e.g., shyness, self-consciousness, anger, etc.); (b) the social support network; and (c) ratings of trait guilt, moral standards, and relevant adjectives by friends and family members. Results indicated that trait and state guilt scores were significantly related to various interpersonal measures, most particularly, depression, anxiety, shyness, and loneliness, but only modestly related to satisfaction with social support. Moral standards were generally unrelated to these variables. Others tended to rate participants higher on trait guilt negatively (e.g., higher on contemptuous, angry, guilty, etc.), and participants higher on moral standards in socially acceptable terms (e.g., higher on prompt, self-reliant, moral, and religious). Results are interpreted in view of the frequently cited distinction between social and nonsocial emotions.     

Predicting Personality Stability Across the Life Span: The Role of Competence and Work and Family Commitments

Longitudinal studies suggest modest continuity in personality from adolescence to early adulthood and greater continuity over successive periods during the adult years. However, individual differences in personality stability do exist. We discuss potential sources of personality change, especially as they relate to development, role assumption and commitment, and loss of roles and commitments. Then, using data from the Intergenerational Studies, we employ measures of competence and of work and family commitments, assessed both in high school and adulthood, to predict personality stability from high school to early and late adulthood. Results indicate that personality stability can be successfully predicted with such measures. Greater personality stability is found for those determined to be more planfully competent, but additional family and work role variables also increase predictive power, in some instances. Using two alternate measures of competence—one from the California Q-sort and the other from the California Psychological Inventory—we replicated the finding that men with more disorderly careers show less personality stability, and that women who have experienced more divorces show less personality stability.     

Sacred Violence: the dark side of God

The subject of this essay is the use to which biblical texts which sanction aggression in the name of God have been put by Jews and Christians over the past 2000 years. The divine injunction given to the Israelites to exterminate the Canaanites has been explained in various ways, but without much success. A literal reading of the Hebrew Bible by Jews and Christians, past and present, has led to its exploitation in support of particular ideologies. Given the appalling record of both faith communities in their relationship with those of a different nationality or religious persuasion, it is imperative that the biblical account of the barbarism inflicted by the Israelites on the people of Canaan be subjected to a searching critique.     

Perceived force in fatiguing isometric contractions

An integrative approach emphasizing both psychological and physiological components in force perception has started to emerge in motor psychophysics. In this experiment, the relation between isometric force (produced by the elbow flexors~ and perceived force was examined over a range of forces maintained until maximal endurance. A contralateral-limb matching procedure in which subjects estimated the force of a sustained, constant force contraction by contracting their unfatigued arm at regular intervals was employed. A linear increase in perceived force was observed during the fatiguing contractions, the rate of which depended on the level of force exerted. The sensation of force at maximal endurance was also found to vary with the force exerted. Based on the similarity between these results and those derived from electromyographic studies, we propose that observers use the efferent input to the muscle in preference to its afferent responses in judging the force of muscular contractions.