Fertility cycle patterns in motives for sexual behavior

Three studies examined the relationship between fertility, as indexed by day in cycle or salivary estradiol levels, and reported motives for sexual intercourse. Data from university and community samples in both cross-sectional and repeated-measures designs showed that sex-for-intimacy motives are endorsed significantly less by women who are relatively more fertile or show higher salivary estrogen levels. Sex for enhancement, self-affirmation, and partner approval also declined, although the data were less consistent. The remaining motives (coping and power) showed no consistent patterns across fertility status. Results suggest that sexual motives are rooted partly in woman's biology and are discussed in terms of plausible evolutionary mechanisms that might promote female "choosiness" at midcycle.     

A pilot investigation of a psychosocial activity course for people with spinal cord injuries

This study investigated the general benefits and impact that sports activity courses organized by Back-Up, a charitable trust, have on quality of life, mood, self-efficacy and perceived manageability. Participants were 35 community-based individuals with spinal cord injuries (SCI). Questionnaires were completed at the start and end of the course. Fourteen participants also completed the follow-up questionnaire. Questionnaires included demographic questions, the Life Satisfaction Questionnaire, the Hospital Anxiety and Depression Scale, a measure of Perceived Manageability, the Generalised Self-Efficacy Scale and four questions about what participants had gained. Results found that participants' satisfaction with leisure, generalized self-efficacy and motivation to engage in activities was significantly increased between the start and end of the courses and anxiety significantly reduced. Such results were in line with participants' responses relating to overall gains from the course. At both the start and end of the course, higher Perceived Manageability scores correlated with greater self-efficacy and higher Perceived Manageability scores and self-efficacy were correlated with lower depression and anxiety. The study provides evidence of the benefits of sports participation and teamwork for people with SCI, confirming the results of previous research.     

Stimulus-based lexical distinctiveness as a general word-recognition mechanism

Word recognition is generally assumed to be achieved via competition in the mental lexicon between phonetically similar word forms. However, this process has so far been examined only in the context of auditory phonetic similarity. In the present study, we investigated whether the influence of word-form similarity on word recognition holds in the visual modality and with the patterns of visual phonetic similarity. Deaf and hearing participants identified isolated spoken words presented visually on a video monitor. On the basis of computational modeling of the lexicon from visual confusion matrices of visual speech syllables, words were chosen to vary in visual phonetic distinctiveness, ranging from visually unambiguous (lexical equivalence class [LEC] size of 1) to highly confusable (LEC size greater than 10). Identification accuracy was found to be highly related to the word LEC size and frequency of occurrence in English. Deaf and hearing participants did not differ in their sensitivity to word LEC size and frequency. The results indicate that visual spoken word recognition shows strong similarities with its auditory counterpart in that the same dependencies on lexical similarity and word frequency are found to influence visual speech recognition accuracy. In particular, the results suggest that stimulus-based lexical distinctiveness is a valid construct to describe the underlying machinery of both visual and auditory spoken word recognition.     

Contingencies of self-worth in college students: theory and measurement

The Contingencies of Self-Worth Scale assesses 7 sources of self-esteem in college students: academics, appearance, approval from others, competition, family support, God's love, and virtue. In confirmatory factor analyses on data from 1,418 college students, a 7-factor model fit to the data acceptably well and significantly better than several plausible alternative models. The subscales all have high internal consistency, test-retest reliability, are distinct from other personality measures, and have a simplex structure arrayed on a continuum from external to internal sources of self-esteem. Contingencies of self-worth assessed prior to college predicted how students spent their time during their 1st year of college.     

Interdependent and independent group contingencies with immediate and delayed reinforcement for controlling classroom behavior

Group-oriented contingency systems have enjoyed widespread acceptability, use, and success in classroom settings. Despite their increased use, group contingency systems have at least two disadvantages. First, one or more students may spoil reinforcement for the rest of the class, and, second, the behavior of the entire class often deteriorates as a result of the loss of access to reinforcement. The present study investigated the use of an interdependent group contingency for on-task and disruptive behavior along with an independent group contingency for disruptive behavior to prevent children from spoiling group reinforcement. Immediate and delayed consequences were built into the program to circumvent behavioral deterioration. The results demonstrated that the combination of group contingency systems and immediate and delayed consequences were effective in reducing levels of off-task and disruptive behavior and in increasing on-task behavior. The findings were discussed in terms of the combination of treatment components, potential for generalization, the need for empirical research on social validity, and the practicality and effectiveness of this intervention package for psychologists in the schools.     

Effects of stimulus variability on perception and representation of spoken words in memory

A series of experiments was conducted to investigate the effects of stimulus variability on the memory representations for spoken words. A serial recall task was used to study the effects of changes in speaking rate, talker variability, and overall amplitude on the initial encoding, rehearsal, and recall of lists of spoken words. Interstimulus interval (ISI) was manipulated to determine the time course and nature of processing. The results indicated that at short ISIs, variations in both talker and speaking rate imposed a processing cost that was reflected in poorer serial recall for the primacy portion of word lists. At longer ISIs, however, variation in talker characteristics resulted in improved recall in initial list positions, whereas variation in speaking rate had no effect on recall performance. Amplitude variability had no effect on serial recall across all ISIs. Taken together, these results suggest that encoding of stimulus dimensions such as talker characteristics, speaking rate, and overall amplitude may be the result of distinct perceptual operations. The effects of these sources of stimulus variability in speech are discussed with regard to perceptual saliency, processing demands, and memory representation for spoken words.     

Commentary on high-performance computing and its promises for the behavioral sciences

Even with the advent of magnetic resonance imaging and other sophisticated physiological research, we have not made a great leap forward in creating a physiological map relating each neuron to its activity involved in simple day-to-day psychological processes. In contrast to notable progress in human vision research, we have yet to model the simplest of our daily memory processes in memory research.     

High-performance computer applications in the behavioral sciences

This symposium revisited the 1985 conference on Advanced Computing for Psychology. That meeting examined the application of new supercomputers in the behavioral sciences. The present symposium reviewed high-performance computing as applied to psychological models, human vision, neuralphysiological processes, and statistical analysis. The recent past and the projected future of high-performance computing in the behavioral sciences were evaluated.