Domain differences in the structure of artifactual and natural categories

In three experiments, different methodologies, measures, and items were employed to address the question of whether, and to what extent, membership in a semantic category is all or none (i.e., absolute) or a matter of degree (i.e., graded). Resemblance theory claims that categorization is based on similarity, and because similarity is graded, category membership may also be graded. Psychological essentialism asserts that categorization is based on the presumption of the category essence. Because artifactual (e.g., FURNITURE) and natural (e.g., FRUIT) categories have different sorts of essences, artifacts and natural kinds may be categorized in qualitatively different manners. The results converged onthe finding of a robust domain difference in category structure: Artifactual categories were more graded than natural categories. Furthermore, typicality reliably predicted absolute category membership, but failed to predict graded category membership. These results suggest that resemblance theory and psychological essentialism may provide a concerted account of representation and categorization across domains.     

TEAM SPORTS FOR THE SEVERELY RETARDED: TRAINING A SIDE-OF-THE-FOOT SOCCER PASS USING A MAXIMUM-TO-MINIMUM PROMPT REDUCTION STRATEGY

A program to teach three severely retarded adults to use a side-of-the-foot soccer pass was evaluated. A 9-step stimulus-response chain was taught using forward chaining. In contrast to usual practice, intensive physical prompts were provided initially to teach each response component, then systematically faded. Approximately 20 lessons (trials) were presented in 20-min sessions. A multiple baseline across subjects design showed that the three trainees achieved the no-prompt criterion after 24, 29, and 22 sessions, respectively. Subanalyses indicated that successive response components were learned only after training was implemented. Follow-up data were obtained 57 and 276 days later in the training room and in a gymnasium; in both settings, criterion was achieved with fewer than three reinstructions.     

The example of Christ and voluntary active euthanasia

The Christian church's aversion to suicide need not inform its position on voluntary active euthanasia any more than it informs its understanding of the role Jesus played in securing his own death. When the ontological polarity of freedom and destiny is kept in balance and is in agreement spontaneously and independently, culpability for the death of Jesus should be assigned neither to him nor to those who sought his crucifixion. This correspondence of freedom and destiny results in a theonomous moment, transcending all guilt. Similarly, when one elects to die because that choice best corresponds with one's self-image, it is extremely doubtful that this act of faith can be made intelligible or justified to others. If Jesus is example and not merely redeemer, this understanding implies that all people should be afforded the same freedom in death that jesus was without incurring moral guilt.     

Conversion theory and simultaneous majority/minority influence: Can reactance offer an alternative explanation?

This study tested whether reactance theory can account for private acceptance of a minority opinion under simultaneous majority/minority influence (reactance against majority rather than conversion toward minority). Subjects were either exposed to simultaneous majority /minority influence or to a majority source only. As predicted by conversion theory, subjects moved away from the majority only in private and in the presence of a consistent minority. In the absence of a consistent minority, subjects accepted the majority opinion in private, ruling out reactance as an alternative explanation.     

Keeping track of needs in communal and exchange relationships

Keeping track of needs in communal and exchange relationships was investigated in two experiments. In both, subjects could check to see if another person needed help. The first experiment tested the hypotheses that When there is no opportunity for the other to reciprocate in kind, keeping track of the other's needs will be greater if the person desires a communal relationship with the other than if the person desires an exchange relationship with the other. If the person desires an exchange relationship with the other, keeping track of the other's needs will be greater when an opportunity for the other to reciprocate in kind exists than when it does not. If a communal relationship is desired, the existence of an opportunity for the other to reciprocate in kind will not influence keeping track of the other's needs. The results of the first experiment supported all three hypotheses. The second experiment tested and found support for the hypothesis that even when nothing can be done to help the other, keeping track of the other's needs will be greater if a communal relationship is desired with the other than if an exchange relationship is desired.     

Referential processing: Reciprocity and correlates of naming and imaging

To shed light on the referential processes that underlie mental translation between representations of objects and words, we studied the reciprocity and determinants of naming and imaging reaction times (RT). Ninety-six subjects pressed a key when they had covertly named 248 pictures or imaged to their names. Mean naming and imagery RTs for each item were correlated with one another, and with properties of names, images, and their interconnections suggested by prior research and dual coding theory. Imagery RTs correlated .56 (df = 246) with manual naming RTs and .58 with voicekey naming RTs from prior studies. A factor analysis of the RTs and of 31 item characteristics revealed 7 dimensions. Imagery and naming RTs loaded on a common referential factor that included variables related to both directions of processing (e.g., missing names and missing images). Naming RTs also loaded on a nonverbal-to-verbal factor that included such variables as number of different names, whereas imagery RTs loaded on a verbal-to-nonverbal factor that included such variables as rated consistency of imagery. The other factors were verbal familiarity, verbal complexity, nonverbal familiarity, and nonverbal complexity. The findings confirm the reciprocity of imaging and naming, and their relation to constructs associated with distinct phases of referential processing.     

Recognition of multiple-item probes

In the present study, we contrasted models in whichfamiliarity orstrength is the sole basis for recognition judgments (e.g., Gillund & Shiffrin, 1984) with models incorporating retrieval of specific information in a recall-like process (e.g., Humphreys, 1976, 1978; Humphreys & Bain, 1984). We also examined the possibility that an item’s “strength” is determined in part by the match between the verbal encoding contexts at study and at test. In two experiments, study items were presented in triplets. In Experiment 1 recognition was tested with all possible combinations of one-, two-, or three-item targets and distractors; in addition, three different decision criteria were employed in different lists. Experiment 2 included cued recognition among other test conditions. Recognition performance did not increase as more cues were added to the probe, a finding that is inconsistent with Humphreys’s model and other models of that type. Both studies were well fit by a version of the Search of Associative Memory model for recognition (Gillund & Shiffrin, 1984).     

Masculinity, femininity, and psychosocial adjustment in medical students: a 2-year follow-up

As part of a longitudinal study of medical students, relations between masculinity and femininity and psychosocial well-being were investigated over a 21-month interval. Of a class of medical students, 82% (N = 99) completed measures of masculinity and femininity during orientation and, 21 months later, completed a broad array of measures of psychological well-being, interpersonal functioning, humanistic attitudes toward patient care, and alcohol consumption. Hierarchical multiple regression analyses with interaction terms revealed main effects of masculinity on self-esteem, extraversion, and confidence, and main effects of femininity on hedonic capacity, interpersonal satisfaction, sharing of personal problems, and alcohol consumption. Little evidence for additive or balance androgyny formulations was found. Findings for masculinity were consistent with earlier findings from this study and others, but they were weaker in magnitude. Findings for femininity were surprisingly robust and enrich the construct validity of this measure. Measures of impaired mood and of alcohol and drug impairment were also studied in relation to masculinity and femininity. Both variables contribute to the prediction of depressed mood; femininity also contributes to the prediction of drug involvement. Neither scale has sufficient sensitivity or specificity to be used by itself as a test of impairment.     

Individual differences in customer sociability

Two studies examined the quality of clerk-customer interactions. In the first study, customers in a mall were followed from one purchase to another and retest reliability of customer sociability was found to be 0.73. A second study of the same and another mall found a retest reliability of 0.56 for customer sociability and a correlation of 0.57 between sociability of different salespersons serving the same customer. These results indicate that the sociability of salesperson—customer interactions is determined by stable individual differences in customer sociability, and suggest that salespeople do better to echo than to escalate customer sociability.