The Risk and Protective Functions of Perceived Family and Peer Microsystems Among Urban Adolescents in Poverty

Utilized a pattern-based approach to discover the different constellations of perceived social transactions separately for family and peer systems and explored the risk and protective functions of these microsystem profiles for both depression and antisocial behavior among a sample of ethnically and racially diverse urban adolescents living in poverty. Measures of perceived social support, involvement and hassles with family and peers, as well as perceived social acceptance and peers' values were entered into two sets of iterative cluster analyses to identify distinct profiles of family and peer transactions. From each of the perceived family and peer transactional analyses, six replicated profiles emerged. Several of the profiles were consistent with expectations from prior literature such as Enmeshing families and Rejecting peer networks, while others were novel and intriguing such as Entangling peers. Family profiles were consistent in their risk and protective associations for both depression and antisocial behavior, while the peer profiles varied in their effects for each developmental outcome. For example, the Rejecting peer profile placed adolescents at increased risk for depression but protected them from antisocial behavior. Implications for future research and preventive intervention are discussed.     

On the relevance of locus equations for production and perception of stop consonants

We examined the possible relevance of locus equations to human production and perception of stop consonants. The orderly output constraint (OOC) of Sussman, Frachter, and Cable (1995) claims that humans have evolved to produce speech such thatF2 at consonant release andF2 at vowel midpoint are linearly related for consonants so that developing perceptual systems can form representations in anF2 _ons-by-F2 _vowel space. The theory claims that this relationship described by locus equations can distinguish consonants, and that the linearity of locus equations is captured in neural representations and is thus perceptually relevant. We investigated these claims by testing how closely locus equations reflect the production and perception of stop consonants. In Experiment 1, we induced speakers to change their locus equation slope and intercept parameters systematically, but found that consonants remained distinctive in slope-by-intercept space. In Experiment 2, we presented stop-consonant syllables with their bursts removed to listeners, and compared their classification error matrices with the predictions of a model using locus equation prototypes and with those of an exemplar-based model that usesF2 _ons andF2 _vowel, but not locus equations. Both models failed to account for a large proportion of the variance in listeners’ responses; the locus equation model was no better in its predictions than the exemplar model. These findings are discussed in the context of the OOC.     

Graph-theoretic representations for proximity matrices through strongly-anti-Robinson or circular strongly-anti-Robinson matrices

There are various optimization strategies for approximating, through the minimization of a least-squares loss function, a given symmetric proximity matrix by a sum of matrices each subject to some collection of order constraints on its entries. We extend these approaches to include components in the approximating sum that satisfy what are called the strongly-anti-Robinson (SAR) or circular strongly-anti-Robinson (CSAR) restrictions. A matrix that is SAR or CSAR is representable by a particular graph-theoretic structure, where each matrix entry is reproducible from certain minimum path lengths in the graph. One published proximity matrix is used extensively to illustrate the types of approximation that ensue when the SAR or CSAR constraints are imposed.The authors are indebted to Boris Mirkin who first noted in a personal communication to one of us (LH, April 22, 1996) that the optimization method for fitting anti-Robinson matrices in Hubert and Arabie (1994) should be extendable to the fitting of strongly anti-Robinson matrices as well.     

When writing helps to heal: E-mail as therapy

A new form of therapy termed therap-e-mail, developed by the authors for use in their Internet-based counselling service Therapy Online, is explained. Two major challenges that have been brought up by other professionals concerning on-line therapy are addressed, and solutions to these challenges are proposed. Five significant advantages of therap-e-mail are discussed The need for research, and the implications for guidance and counselling, are addressed     

The mental illness defense in the capital penalty hearing

Several defense strategies are available to the capital defendant who is arguing for life in the penalty phase, including a mental illness (MI) defense. An MI defense presents psychiatric testimony to the effect that the defendant was mentally disturbed at the time of the offense and, therefore, should not be held completely responsible. The few studies available suggest that an MI defense will be ineffective because (1) death-qualified jurors do not respond favorably to purely psychological explanations of criminal behavior and (2) an MI defense may erroneously mislead the jury regarding the defendant's unpredictability and dangerousness. Analagous studies of insanity acquittals suggest certain factors that may be associated with a succesful MI defense.     

An examination of employee perceptions of a subjective performance appraisal system

This study sought to identify factors related to employee perceptions of the accuracy of performance ratings they received using a subjective rating system. It also sought to determine if the relationship between these correlates and perceived fairness and accuracy was moderated by employee sex and/or race. The results were based on the analysis of items from questionnaires completed by 234 government employees whose job performance was rated on a graphic rating scale. A factor analysis of the predictor items yielded three factors. The first factor dealt with employees' confidence in their supervisors' qualifications to accurately rate their performance, the second with matters related to a discussion of appraisal outcomes (i.e., rewards and career progress), and the third with the relevance of the appraisal instrument. The measure of perceived fairness and accuracy was regressed onto scores derived for each of the three factors, plus a set of contrast variables representing the various race/sex groupings and a set of demographic variables (viz., job tenure, education level, and supervisory status). Factors 1 and 2, race, and supervisory status were found to be significantly related to perceived fairness and accuracy. Moreover, the relationship of the criterion with job tenure was moderated by race, that with factor 2 was moderated by sex. Management implications of these findings are discussed.     

Serial search and comparison of features of imagined and perceived objects

Four experiments studied the spatial information processing involved in making a series of same-different comparisons of features of two objects. When the path between successively compared features on one object was antiparallel with the corresponding path on the other, comparison of a series of features took longer and produced many more errors. These results were observed both when the objects were externally presented and when one object was imagined and the other externally presented. Knowing the location of the next feature seems much more important for effective search than does monitoring the location of the feature used in the preceding comparison. When paths between corresponding features are parallel, search of features of one object may guide search of the other. When the directions between corresponding features are incongruous, search for the next angle may produce a competition for processes or processing resources, or may produce interfering cross-talk between the spatial information processing of the concurrent search tasks. Because of incongruity, as demonstrated in this study, serial search of objects at different orientations is difficult.     

Cross-validation of a minnesota multiphasic personality inventory (MMPI) subscale for the assessment of combat-related post-traumatic stress disorder

We have examined the Minnesota Multiphasic Personality Inventory (MMPI) scores of 80 carefully diagnosed veterans with post-traumatic stress disorder (PTSD) in an attempt to cross-validate the PTSD subscale and three-point MMPI code of Keane, Malloy, and Fairbank (1984). In general, although we replicated Keane and co-workers'cutoff scores, our hit rates were slightly lower than those reported originally.This research was supported in part by NIMH Grant MH-37839 to Dr. Kolb.