A low-cost high-speed digital data acquisition and display system

A flexible and inexpensive data acquisition and display system based upon the KIM-1 microcomputer module is described. A simple signal-conditioning circuit and program are shown that will allow events to be counted at rates to 1,000/sec and stored in successive time bins. The program counts events from each of two event detectors and stores the count of each detector in an independent set of time bins. Up to 127 16-bit bins are available to each event detector and bin width can be varied from 1 msec to 1 min. A separate input can be used to time-lock data collection to a specific stimulus allowing poststimulus histograms or IRTs to be collected. The collected data can be sequentially displayed as a decimal number on a built-in LED display and stored for later analysis on an inexpensive audio cassette recorder.     

A microprocessor control system and solid state interface for controlling electrophysiological studies of conditioning

This paper describes a microprocessor control system and solid state interface for controlling the apparatus in combined behavioral-electrophysiological studies of conditioning. The computer program, which is designed to control classical conditioning of the rabbit’s nictitating membrane response, provides the flexibility to control all conditioning parameters (e.g., interstimulus and intertrial intervals, trial type, and sequence of trial types) with only minor modifications. The system is free from artifacts that can distort electrophysiological recordings and can easily be modified to accommodate other behavioral paradigms in which electrophysiological responses are recorded.     

A Psychometric Evaluation of the Chinese Version of the Students’ Life Satisfaction Scale

The present study reported the initial validation of an abbreviated version of the Students' Life Satisfaction Scale- Chinese version (SLSS-Chinese) in two samples of Chinese middle school students. Initial analyses based on the original 7-item scale suggested that the two reverse-worded items functioned differently compared to other items. The plausible reasons behind this finding were discussed based on extant literature on mixed worded scales and cross-cultural research on life satisfaction scales. Then we compared the validity of three formats of the SLSS-Chinese: the 7-item (full scale), the 5-item (positively worded items only), and the 2-item (reverseworded items only) scales, respectively. Convergent evidence suggested that the two reverse-worded items hampered the scale's internal consistency, dimensionality, and validity. Also, the 5-item scale demonstrated good psychometric properties, and was clearly superior compared to the 7-item scale. These findings provide a solid foundation for applying the 5-item SLSS-Chinese in measuring Chinese adolescents' life satisfaction.     

The Impact of Specific Psychotherapist Beliefs Regarding Managed Care on Prospective Psychotherapy Clients

The purpose of this study was to investigate the separate impact of each of thirteen therapist beliefs that, presented collectively, were previously found to have a significantly negative impact on prospective clients' attitudes toward managed care psychotherapy (Pomerantz, 2000). Participants in this study initially completed a brief questionnaire measuring their willingness to enter psychotherapy and their expectations regarding psychotherapy under managed care. Participants subsequently completed the same brief questionnaire again after being instructed to imagine seeing a hypothetical psychologist and being presented with the psychologist's supposed beliefs regarding managed care (which were actually derived from survey data by Murphy et al., 1998). Results suggest that almost every discrete therapist belief had a significantly negative impact on participants' attitudes toward managed care psychotherapy. Several specific therapist beliefs produced particularly salient negative effects. Implications regarding ethics and informed consent are discussed.     

Parent-Professional Alliance and Outcomes of Child,Parent, and Family Treatment: A Systematic Review

This review systematically explored research examining the relation between parent-professional alliance and outcomes of psychosocial treatments provided to children, and their parents and families. Study findings and methodological characteristics were reviewed to investigate the evidence linking the alliance between parents and professionals to outcomes of child, parent, and family treatment as well as to identify factors that may influence the alliance-outcome association. A systematic review of the literature was conducted that included a search of three electronic databases using specified search terms, followed by a hand search to identify relevant studies. A total of 46 studies (37 published articles and 9 unpublished dissertations) met inclusion criteria. Overall, the findings indicated that higher levels of parent-professional alliance were significantly associated with improved clinical outcomes and stronger treatment engagement. However, some studies found that the parent-professional alliance was not significantly related to clinical outcomes or treatment engagement, and a few studies showed that higher levels of alliance were related to less positive clinical outcomes and lower levels of treatment engagement. Several theoretical (problem type, child age, parent sex) and methodological (source and timing of alliance measurement, alliance-outcome informants, outcome domain, timing of outcome measurement) factors were identified that could influence the alliance-outcome association. Together, our findings emphasize the importance of alliance awareness when working with parents as well as a need for future studies to investigate factors influencing the quality of the parent-professional alliance and alliance-outcome association in child, parent, and family treatment.     

How Obvious Is It? The Content of Child Sexual Exploitation Websites

Those who distribute child sexual exploitation (CE) material in the public Internet potentially face greater risks of detection. While public distribution is prevalent, little is known about the structure of these websites. We investigate whether websites take steps to hide their purpose, and, if so, what steps are taken? We analyze 634 websites directly or indirectly, via hyperlinks, connected to websites hosting known CE material, and compare our findings to an automated examination of the same websites. We determine whether the initial visual representation is congruent with the underlying structure and content identified in the automated data collection. Implications for understanding cybercriminal processes are discussed.     

Estimating stimuli from contrasting categories: truncation due to boundaries

In this article, the authors present and test a formal model that holds that people use information about category boundaries in estimating inexactly represented stimuli. Boundaries restrict stimuli that are category members to fall within a particular range. This model posits that people increase the average accuracy of stimulus estimates by integrating fine-grain values with boundary information, eliminating extreme responses. The authors present 4 experiments in which people estimated sizes of squares from 2 adjacent or partially overlapping stimulus sets. When stimuli from the 2 sets were paired in presentation, people formed relative size categories, truncating their estimates at the boundaries of these categories. Truncation at the boundary of separation between the categories led to exaggeration of differences between stimuli that cross categories. Yet truncated values are shown to be more accurate on average than unadjusted values.     

Life Satisfaction, Dieting Behavior, and Weight Perceptions among College Students

This study examined the relationships among perceived life satisfaction, perceptions of body weight, and dieting behaviors among 522 college students. Adjusted multiple logistic regression analyses and multivariate models constructed separately were utilized for this study. Perceptions of underweight and extreme worry over weight were significantly associated with dissatisfaction with life for both males and females (p < 0.01). However, vomiting; perceptions of overweight; binge eating behavior; extreme worry over binge eating behavior; and engaging in binge eating behavior for more than one year were significantly related to dissatisfaction with life for only females (p < 0.01). In addition, both males and females were less likely to self-identify problematic disordered eating, with males being particularly less likely to report concern over extreme dieting behaviors. Results suggest that carefully designed educational and intervention efforts for college students with eating disorders must take gender differences into account. Programs for males may need to differ from those for females in terms of recruitment, intervention integrity, and evaluation considerations.

An Ecological View of School Satisfaction in Adolescence: Linkages Between Social Support and Behavior Problems

This study investigated the relationships among school satisfaction, social support, and problem behaviors in adolescents. Modest associations were found between school satisfaction and the demographic variables of gender, race, age, and grade level. Support from teachers, parents, and classmates contributed unique variance to ratings of school satisfaction; with teacher support contributing the most unique variance. School satisfaction mediated the relationship between social support and internalizing and externalizing behaviors. School satisfaction did not moderate the relationship between social support and problem behavior; however, it did serve as a protective factor across all levels of social support. Implications are discussed, including suggestions for developing interventions that focus on increasing support for adolescents in efforts to improve school satisfaction and reduce problem behaviors.