The role of three-dimensional depth cues in infants' perception of partly occluded objects

Newborn infants were familiarized to a three dimensional display consisting of a rod which moved behind a central occluder, so that only the top and bottom of the rod were visible. The infants' eyes were 38 cm from the rod and the occluder was 15 cm in front of the rod, a separation intended to ensure that the gap between the two was detected by the infants. On subsequent test trials the infants looked longer at a complete rod than at two rod pieces, suggesting that the hidden unity, or completeness of the rod had not been perceived. In a study by Johnson and Náñez (in press), using computer. generated stimuli, 4 month olds perceived the hidden unity of a similar display presented on a VDU in the complete absence of three. dimensional depth cues. Taken together, these findings suggest that, for these displays, perception of three. dimensional depth cues is not necessary for the detection of the unity of partially hidden objects. It is suggested that age changes in early infancy in the perception of occluded objects may result either from the emergence of abilities to perceive objects from kinematic information or from the emergence of sensitivity to that information itself.     

Subjective familiarity of English word/name homophones

The subjective familiarity of 40 homophone pairs was examined. The homophones consisted of monosyllabic English words (on one reading) and male first names (on the other)—for example,art andArt. Subjects heard these homophones embedded in two kinds of lists, one with 40 unambiguous words and one with 40 unambiguous names. Ratings were made for familiarity as words and as names. These correlated significantly with the log of printed frequency (.63 for words, .53 for names). In a final task, just the homophones were presented, and the subjects were asked for a comparative rating of whether the word usage or the name usage was more familiar. This direct comparison correlated well (.91) with the difference between the ratings for the name and word familiarities, but less well (.55) with the differences between the printed frequencies of the word and name meanings. This indicates either consistent biases in the judgments or true differences between printed frequencies and subjective familiarity.     

The impact of career exploration and interview readiness on interview performance and outcomes

In a longitudinal study of 78 graduate business students, three aspects of career exploration—environment exploration, self-exploration, and the amount of information acquired—were examined as predictors of interview performance (interview rating and self-rating) and outcomes (call-back interviews and job offers). Environment exploration and the amount of information acquired related significantly with the recruiter's rating of interview performance and interview outcomes; self-exploration correlated with the recruiter's rating of interview performance. Interview readiness variables (perceived past performance, verbal persuasion, and feelings of self-efficacy) correlated modestly with career exploration variables, interview performance ratings, and interview outcomes.     

The Effect of Mood and Social Outlook on Hypothetical Juridic Decisions1

Data are reported for a laboratory experiment which examines both the impact of information about remote social events on judgments of defendants' guilt or innocence in two court cases and the roles of cognitive and affective elements in mediating these judgments. Subjects were exposed to one of four pretested news bulletins which covaried cognitive factors (positive or negative social information) and affective ones (positive or negative mood stimuli). In accord with previous findings, the results indicate that social information and the changes in social outlook that it caused were of primary importance in altering subjects' judgments about defendants. Subjects who heard positive social information in radio newscasts were more lenient in their judgments of defendants than were those who heard negative social information. Additional findings pertaining to the mediators of this effect suggest that positive mood amplified the impact of social information whatever its direction, while negative mood attenuated it.     

Learning about water by hungry rats

In Experiments 1 and 2 hungry rats were trained in a straight alley with consistent food reward (FF), food and nonreward trials intermixed (FN), or food and water trials intermixed (FW). In Experiment 1 rats were tested with nonrewarded trials (extinction) and Groups FN and FW did not differ, both running faster then Group FF. In Experiment 2 rats were tested with consistent water reward, and Group FW ran faster then Group FN, which was superior to Group FF. In Experiment 3, one group of hungry rats was trained on a single alternating schedule of food and water in Phase 1 and was shifted to a single alternating schedule of food and nonreward in Phase 2 (Group FW); the second group (Group FN) received a single alternating schedule of food and nonreward in both phases. When Group FW was shifted to nonreward from water, performance to nonreward was temporarily disrupted. These results indicate that, contrary to previous conclusions, hungry rats can learn about water when drive is strong and food is received in the situation.     

Acquiring complex partial orderings in comparison with acquiring similar-sized linear orderings

The acquisition of a 14-term partial ordering was compared with the acquisition of a 14-term linear ordering. Learning the partial ordering was found to be more difficult because of two factors: (1) Subjects do not appear to have in their knowledge systems a prototype or rule for representing a long list of comparative relations as a partial ordering structure, and (2) the partial ordering must be presented so that some of the adjacently presented premises do not contain a common element. When these two factors were controlled, the partial ordering was as easy to learn as the linear ordering. It was also found that subjects learning the partial ordering showed no evidence of a serial position learning curve, whereas subjects learning the linear ordering showed some tendency to produce a serial position learning curve.     

Decision versus policy in crises intervention

The paper describes procedures for contrasting actions taken by crises intervention outreach workers and consumers with administrative policies. The data used to exemplify the procedures came from the outreach projects of six county MH/MR programs in Central Pennsylvania during the year following the flood caused by Hurricane Agnes, in 1972. The procedure identifies and counts the ways through which consumers entered the outreach process; the major outreach worker decision; and the immediate disposition of each consumer's case. The six county MH/MR program administrators were asked to consider program policies and show how they would ideally expect 1,000 hypothetical consumers to come into, to be processed through, and to be referred out of their respective outreach programs. Contrasts of the ideal and actual consumer data, along with consumer follow-up questionnaires, provided the basis for evaluating the six county MH/MR program outreach projects. These experiences provided the basis for a generalized model of evaluating crises intervention activities.     

Improving Self-Concept and Learning Skills of Marginal Black Students: A Seminar Approach

In this article, an eight-session seminar model is presented. This seminar is designed to increase participants' study skills and to redefine participants' self-concepts from those characterized by feelings of inadequacy and frustration to concepts of selves as competent and capable. Specific study skills content covers learning strategies, two-way communication, learning styles, note making, test taking, vocational planning, and academic coping strategies. This seminar model has been used to meet the above goals with considerable success; relevant data from the evaluation of a class taught using this model is included.     

A prospective naturalistic study of the impact of an intensive medical treatment on the social behavior of child and adolescent cancer patients

The impact of intensive chemotherapy and prolonged hospitalization on the social behavior of child and adolescent cancer patients was assessed. Twenty-three patients, aged 18 months to 21 years, were observed while they received chemotherapy in a protected environment or in a regular hospital room. Single-subject analyses were used to examine changes on six behaviors in relation to changes in physiological status. Fourteen patients showed significant change in the frequency of at least one behavior. Play and sleep were the behaviors most likely to change. The changes began to occur as patients experienced the systemic toxic effects of the drugs, although a dissipation of drug toxicity generally was not accompanied by a corresponding behavior change. The findings are discussed in relation to age-developmental and interindividual heterogeneity in response to treatment.