Modifying law enforcement training simulators for use in basic research

Several approaches to using simulation as a method for teaching good judgment in the use of firearms by law enforcement officers and military personnel were investigated for their potential applications to research: the GAMMA Live Fire Video Training System, the FireArms Training Systems Simulator (FATS), and the Judgment Under Stress Training (JUST) simulator. Each instrument uses real-time, computer-controlled, life-sized projected video images of scenarios that may or may not present a threat, and handguns that fire real or simulated ammunition. The subjects respond to a sequence of “shoot/no-shoot” judgment scenarios resulting in data on judgment, reaction time, and accuracy. The JUST simulator was found to be more easily modifiable in capturing data on performance at microanalytic levels. Although true interactive simulations are not feasible with this system, this was not seen as a hindrance to its usefulness for research.     

Probability as a Theory Dependent Concept

It is argued that probability should be defined implicitly by the distributions of possible measurement values characteristic of a theory. These distributions are tested by, but not defined in terms of, relative frequencies of occurrences of events of a specified kind. The adoption of an a priori probability in an empirical investigation constitutes part of the formulation of a theory. In particular, an assumption of equiprobability in a given situation is merely one hypothesis inter alia, which can be tested, like any other assumption. Probability in relation to some theories – for example quantum mechanics – need not satisfy the Kolmogorov axioms. To illustrate how two theories about the same system can generate quite different probability concepts, and not just different probabilistic predictions, a team game for three players is described. If only classical methods are allowed, a 75% success rate at best can be achieved. Nevertheless, a quantum strategy exists that gives a 100% probability of winning. This revised version was published online in June 2006 with corrections to the Cover Date.     

Stability and change in types of behavioral disturbance of children and adolescents

Changes with aging and stability of dimensions of behavioral disturbance were determined for 732 children and adolescents who constituted the sample reassessed after 5 years of an original cross-sectional sample of Manhattan youth 6 to 18 years old. On three of the six types of disturbance strongly related to the total impairment judgments of psychiatrists, specifically those tapping domains of aggression, greater or constant levels of pathology were noted over time. Cross-sectional versus longitudinal analyses on the same types of disturbance had discrepant results half the time. Stability coefficients for five of the six types of disturbance were greater than .55. Stability curves by age cohorts investigated whether a type of disturbance appeared transitory at certain age periods but more crystallized at other ages. Its prognostic significance would vary accordingly. Implications for intervention-treatment and for studies comparing the predictive value of different classes of behavior, e.g., neurotic versus antisocial, are discussed.This investigation was supported by U. S. Public Health Service Project Grants MH-11545 and MH-18260 of the National Institute of Mental Health, Center for Epidemiological Studies. Support for the principal investigator was given by Career Scientist Grants I-338 and I-640 of the Health Research Council of the City of New York. The principal investigator is currently supported through Research Scientist Award K5-MH-20868 of the National Institute of Mental Health.This research was presented in part at the Eastern Psychological Association Meetings, April 3–5, 1975, New York City.     

The effect of enactment upon sentence imitation in preschool children

Preschool children imitated two matched lists of sentences varying in length, in syntactic complexity, and in semantic complexity. Sentences on one list were acted out with toys prior to imitating them. For 3-year-olds, enactment increased retention of all sentential variables: number of words, number of frames, number of propositions, and syntax. For children younger than 3 years, enactment increased only the number of words retained, while for children older than 4 years, enactment had a minimal effect on all sentential variables. In a second experiment, prior enactment had long-term effects on the degree to which children's spontaneous stories about the toys resembled the previous sentences that they had been given to imitate. Long-term effects, however, did not extend to retention of syntax. Enactment appears to increase both young children's interest in a sentence imitation task and the amount of semantic encoding in which they engage. Its effect, however, is mediated by the degree of mastery of relevant linguistic rules.Some of these data were presented at the Biennial Meeting of the Society for Research in Child Development, Detroit, April 1983. The authors would like to thank Lorraine Chiasson, Judith Codd, and Susan Saba for their assistance with the data analysis.     

Measuring social skill in grade school boys

This study examined positive and negative assertive skill in 60 elementary school boys, grades 3–8. Subjects' role-played responses to standard analogue situations requiring expression of positive and negative assertion were videotaped and rated retrospectively. High- and low-assertive subjects were identified through ratings of overall assertiveness. Results of this study indicate that (1) high- and low-assertive subjects differ on a number of response components which are related to age level and type of assertive situation (positive vs. negative), (2) assertive skill is associated with role-taking (or decentering) ability, (3) teachers tend to perceive their assertive boys as more sociable and interpersonally sensitive than unassertive boys, (4) there is essentially no correlation between teachers' ratings of aggressiveness and separate behavioral ratings of assertive skill, and (5) behavioral ratings of assertiveness show little relationship to self-report or teachers' ratings of assertiveness.This article is based on a dissertation submitted to the Faculty of the Graduate School of Loyola University of Chicago in partial fulfillment of the requirements for the Degree of Doctor of Philosophy. The study was conducted under the direction of the second, third, and fourth authors.     

Metalexical Awareness: Development, Methodology or Written Language? A Cross-linguistic Comparison

This study explores the ability to access word boundaries of pre-school children, using an on-line methodology (Karmiloff-Smith, Grant, Sims, Jones, & Cockle (1996). Cognition, 58, 197–219.), which has hardly been used outside English-speaking countries. In a cross-linguistic study in the Netherlands and Norway, four and five-year-old children were asked to repeat the last word every time a narrator stopped reading a story. In total 32 target-words were used, both closed and open class words, and both monosyllabic and disyllabic words. The outcomes in both countries were different from those of the original English study (Karmiloff-Smith et al., 1996): four- and five-year-olds were successful in only about 26% of the cases, whereas the success rate in the former English experiment was 75% for the younger and 96% for the older children. No differences were found between age groups and between open and closed class words. This methodology does reveal the ability to access word boundaries, but probably not because of the ease of the on-line methodology in itself, but rather because literacy introduces new representations of language, even in on-line processing. The outcomes implicate that the ability to mark word boundaries does not seem to be a valid indication of who is ready for reading.     

Risk perceptions, worry, and attitudes about genetic testing for breast cancer susceptibility

This study assessed the unique associations of risk perceptions and worry with attitudes about genetic testing for breast cancer susceptibility. Women (general practitioner clinic attenders, university students, and first-degree relatives of breast cancer survivors; N?=?303) read information about genetic testing and completed measures assessing perceived cancer risk, cancer worry, and genetic testing attitudes and beliefs. Worry was associated with greater interest in genetic testing, stronger beliefs that testing has detrimental emotional consequences, and positive beliefs about benefits of testing and risk-reducing surgeries. Perceived risk was unrelated to interest and associated with more skeptical beliefs about emotional consequences and benefits of testing and risk-reducing surgeries. At low worry levels, testing interest increased with more positive beliefs about testing benefits; at high worry levels, interest was high regardless of benefits beliefs. The findings support Leventhal's Common-Sense Model of self-regulation delineating interactive influences of risk-related cognitions and emotions on information processing and behavior.     

Maternal employment and child development: a fresh look using newer methods

The employment rate for mothers with young children has increased dramatically over the past 25 years. Estimating the effects of maternal employment on children's development is challenged by selection bias and the missing data endemic to most policy research. To address these issues, this study uses propensity score matching and multiple imputation. The authors compare outcomes across 4 maternal employment patterns: no work in first 3 years postbirth, work only after 1st year, part-time work in 1st year, and full-time work in 1st year. Our results demonstrate small but significant negative effects of maternal employment on children's cognitive outcomes for full-time employment in the 1st year postbirth as compared with employment postponed until after the 1st year. Multiple imputation yields noticeably different estimates as compared with a complete case approach for many measures. Differences between results from propensity score approaches and regression modeling are often minimal.     

The effectiveness of early head start for 3-year-old children and their parents: lessons for policy and programs

Early Head Start, a federal program begun in 1995 for low-income pregnant women and families with infants and toddlers, was evaluated through a randomized trial of 3,001 families in 17 programs. Interviews with primary caregivers, child assessments, and observations of parent-child interactions were completed when children were 3 years old. Caregivers were diverse in race-ethnicity, language, and other characteristics. Regression-adjusted impact analyses showed that 3-year-old program children performed better than did control children in cognitive and language development, displayed higher emotional engagement of the parent and sustained attention with play objects, and were lower in aggressive behavior. Compared with controls, Early Head Start parents were more emotionally supportive, provided more language and learning stimulation, read to their children more, and spanked less. The strongest and most numerous impacts were for programs that offered a mix of home-visiting and center-based services and that fully implemented the performance standards early.     

Neighborhood poverty and public policy: a 5-year follow-up of children's educational outcomes in the New York City moving to opportunity demonstration

Data from the Moving to Opportunity Program, a randomized mobility experiment in which a subset of low-income minority families living in public housing in high-poverty neighborhoods were given vouchers to move to low-poverty neighborhoods, were used to evaluate 1 policy approach for improving children's educational outcomes. Four hundred twenty-five New York City children were seen 2 1/2 and 5 years following relocation (mean age=14.64 years, SD=3.21 years). Analyses examining program effects on 5-year educational outcomes, accounting for 2 1/2-year outcomes, revealed that program effects on adolescent boys' achievement found at 2 1/2 years were not sustained at 5 years. Rather, male and female youths 14-20 years of age in low-poverty neighborhoods reported lower school grades and engagement relative to youths in high-poverty neighborhoods. From a policy standpoint, the complexity of enhancing low-income minority children's educational outcomes is underscored by the multiple dynamics involved--family, neighborhood, housing, and school.