Preparatory Set,Response Complexity,and Reaction Latency

The interaction between preparatory set and response complexity was demonstrated in an experiment investigating the reaction latency of discrete arm movements. Following simple finger-lift reaction-time (RT) trials, subjects performed simple and complex versions of a discrete horizontal arm movement under one of two enforced preparatory set conditions. For the simple task, requiring subjects to attend to the components of the response prior to stimulus presentation (enforced motor set) produced significantly shorter RTs than when concentration was on the stimulus (enforced sensory set). However, RT differences for the complex version of the task failed significance. Theoretical implications of the results for Henry’s (1960) memory drum theory of neuromotor reaction were discussed.     

Further Tests of Schmidt’s Schema Theory

The present study investigated the generalizability of Schmidt’s (1975) schema theory to an open-skill (Poulton, 1957) situation. Subjects attempted to time a preferred-hand button press so that it was coincident with the lighting of the last of a series of runway lights whose apparent velocity was 4023 mm/sec. Prior to five trials of performance on the criterion task, subjects received 40 trials in which they either (a) watched (low response requirements) or (b) responded with the nonpreferred hand (high response requirements) to a stimulus moving at (a) a constant (2235, 3129, 4917, or 5812 mm/sec) velocity (low stimulus variability) or (b) different velocities (high stimulus variability) from trial to trial. Subjects receiving high stimulus variability and high response requirements during training had significantly lower absolute error on the criterion task than did those in the other conditions. The results were discussed in terms of the type of practice which facilitates development of a schema rule for coincident-timing situations.     

The Relationship Between Parents' Attitudes Toward Child Rearing and the Sociometric Status of Their Preschool Children

A sociometric evaluation of 120 (60 male, 60 female) preschool children was made, using the Parent Attitude Research Instrument (PARI; Shaefer & Bell, 1958). Questionnaires were completed by the parents of a sample of children who had been sociometrically identified as belonging in one of four categories: popular, amiable, isolated, and rejected. Discriminant function analysis revealed that children who were identified by their peers as rejected or isolated had parents that reported child-rearing attitudes reflecting patriarchal family structure, low self-confidence, low preference for young children, infrequent use of praise, lack of promotion of independence, low use of disciplining (mothers) coupled with the view that child rearing is a mother's duty, definite expectations about child behavior, a feeling of responsibility for child-rearing activities, low child orientation, infrequent use of threat, and negative reaction to children's intrusive behavior (fathers). The four sociometric categories accounted for 42% of mothers and 62% of fathers variance in reported child-rearing attitudes. The mothers' function correctly classified 49% and the fathers' correctly classified 44% of the children into the correct sociometric category. These data suggest a potentially important relationship between parents' perception of their child-rearing role and peer relations during early childhood.     

Empowering Latino Church Leaders to Deal with the HIV-AIDS Crisis: A Strengths-Oriented Service Model

Ideology and attitudes of Latino church leaders in the United States toward HIV/AIDS are explored. A qualitative approach utilized with emergent categories including: a desire within the Latino church for greater acceptance of HIV/AIDS sufferers, the supposed contaminating influence of HIV/AIDS individuals over other church members, and the feelings of helplessness many church members experience in relation to the HIV/AIDS crisis. Understanding ideological resistance that prevents engagement is here identified and a strategy of empowerment of church leaders is recommended to overcome it including: adopting a strengths-oriented service model that focuses on resources religious denominations already have, as opposed to a financially driven, medically oriented service model that highlights what churches often do not have; church leaders educating health care agencies on how to use religious beliefs to motivate church members to work on behalf of HIV/AIDS patients; the power of doctrinal ideology in affecting church and civil society’s response to HIV/AIDS.     

Addressing Item-Level Missing Data: A Comparison of Proration and Full Information Maximum Likelihood Estimation

Often when participants have missing scores on one or more of the items comprising a scale, researchers compute prorated scale scores by averaging the available items. Methodologists have cautioned that proration may make strict assumptions about the mean and covariance structures of the items comprising the scale (Schafer &; Graham, 2002 Schafer, J.L., &; Graham, J.W. (2002). Missing data: Our view of the state of the art. Psychological Methods, 7, 147–177.[Crossref], [PubMed], [Web of Science ®] , [Google Scholar]; Graham, 2009 Graham, J.W. (2009). Missing data analysis: Making it work in the real world. Annual Review of Psychology, 60, 549–576.[Crossref], [PubMed], [Web of Science ®] , [Google Scholar]; Enders, 2010 Enders, C.K. (2010). Applied missing data analysis. New York, NY: Guilford Press. [Google Scholar]). We investigated proration empirically and found that it resulted in bias even under a missing completely at random (MCAR) mechanism. To encourage researchers to forgo proration, we describe a full information maximum likelihood (FIML) approach to item-level missing data handling that mitigates the loss in power due to missing scale scores and utilizes the available item-level data without altering the substantive analysis. Specifically, we propose treating the scale score as missing whenever one or more of the items are missing and incorporating items as auxiliary variables. Our simulations suggest that item-level missing data handling drastically increases power relative to scale-level missing data handling. These results have important practical implications, especially when recruiting more participants is prohibitively difficult or expensive. Finally, we illustrate the proposed method with data from an online chronic pain management program.     

A Bayesian Approach for Estimating Mediation Effects With Missing Data

Methodologists have developed mediation analysis techniques for a broad range of substantive applications, yet methods for estimating mediating mechanisms with missing data have been understudied. This study outlined a general Bayesian missing data handling approach that can accommodate mediation analyses with any number of manifest variables. Computer simulation studies showed that the Bayesian approach produced frequentist coverage rates and power estimates that were comparable to those of maximum likelihood with the bias-corrected bootstrap. We share an SAS macro that implements Bayesian estimation and use 2 data analysis examples to demonstrate its use.     

Brueckner and Fischer on the evil of death

According to the Deprivation Approach, the evil of death is to be explained by the fact that death deprives us of the goods we would have enjoyed if we had lived longer. But the Deprivation Approach confronts a problem first discussed by Lucretius. Late birth seems to deprive us of the goods we would have enjoyed if we had been born earlier. Yet no one is troubled by late birth. So it’s hard to see why we should be troubled by its temporal mirror image, early death. In a 1986 paper, Anthony Brueckner and John Martin Fischer appealed to a version of Derek Parfit’s “Bias toward the Future”; they claimed that early death deprives us of future goods that we care about, while late birth deprives us of past goods that we don’t care about. In this paper I show that the Brueckner–Fischer principle is open to several possible interpretations, but that it does not solve the Lucretius problem no matter how we understand it.     

Prospective Associations of Internalizing and Externalizing Problems and Their Co-Occurrence with Early Adolescent Substance Use

The literature is equivocal regarding the role of internalizing problems in the etiology of adolescent substance use. In this study, we examined the association of internalizing and externalizing behavior problems and their co-occurrence with early adolescent substance use to help clarify whether internalizing problems operate as a risk or protective factor. A large community sample (N?=?387; mean age at the first assessment 12 years old; 83 % White/non-Hispanic) was assessed annually for 3 years. Externalizing problem behavior in the absence of internalizing problems showed the strongest prospective association with alcohol, cigarette, and marijuana use. A weaker, albeit statistically significant prospective positive association was found between co-occurring internalizing and externalizing behavior problems and substance use. Internalizing problems in the absence of externalizing problems protected adolescents against cigarette and marijuana use. Clarifying the role of internalizing problems in the etiology of adolescent substance use can inform the development of early intervention and prevention efforts. Our results highlight the importance of further considering the co-occurrence of internalizing and externalizing behavior problems in developmental pathways to substance use.     

Desistance in the Transition to Adulthood: The Roles of Marriage,Military, and Gender

Research is needed on desistance from crime comparatively by gender. This research uses a national longitudinal sample of youth transitioning to adulthood. Drawing on Sampson and Laub's Age-Graded Theory of Informal Social Control, social bonds found in marriage and military involvement are examined to determine if they decrease delinquency over time. The results for the full sample revealed that marriage but not military involvement led to desistance. However, gender sub-sample analyses further showed military enlistment led females, but not males, to desist from crime. Implications and future research aims are discussed.