Understanding the experimenter's intention improves 16-month-olds’ observational learning of the use of a novel tool

Our aim was to investigate why 16-month-old infants fail to master a novel tool-use action via observational learning. We hypothesized that 16-month-olds’ difficulties may be due to not understanding the goal of the observed action. To test this hypothesis, we investigated whether showing infants an explicit demonstration of the goal of the action before demonstrating the action would improve observational learning compared with a classic demonstration of the target action. We examined 16-month-old infants who observed a tool-use action consisting of grasping a rake-like tool to retrieve an out-of-reach toy, under five conditions. Only when infants were shown the goal of the action before demonstration did they show some success.     

Sales Productivity of Insurance Agents During the First Six Months of Employment: Differences Between Older and Younger New Hires

This study investigated the relationship of information-seeking from managers and coworkers, number of prospecting methods used, and number of joint sales calls the new hire went on with managers and coworkers to sales productivity during the first six months of employment. This study also investigated whether age was directly related to sales productivity, indirectly related through its influence on the other independent variables, or moderated the relationship between the independent variables and sales productivity. Results showed that age and going on joint sales calls with managers and coworkers were positively related to sales productivity. Age also served as a moderator. Older new hires who used a variety of prospecting techniques, and younger new hires who asked their peers for information about job and organizational procedures were better performers. The implications of these results for organizations are discussed.     

The Role of Recruit Division Commanders in Graduation From U.S. Navy Recruit Training

We investigated the importance of the role of drill instructors (RDCs) on training and retention of new sailors (N = 34,000). Based on social support and group cohesion literatures, we hypothesized that social support from RDCs would influence completion rates of entry-level Navy training and retention intention of new sailors. We found that perceptions of social support from RDCs had a significant positive relationship with eventual graduation from basic training; encouragement to remain in the Navy was particularly strongly related to graduation when the source of the encouragement was RDCs. Further, those who attrited from training were especially likely to perceive RDCs as encouraging them to leave the Navy. We discuss the implications of our findings in terms of theory, research and practice.     

Development and Evolution of Cognitive Behavior Therapy for Depressed Adolescents

Since the 1980’s cognitive behavior therapy (CBT) has been developed and tested with adolescents experiencing depression. Early studies demonstrated that CBT was more effective than no intervention for young people with depressive symptoms. Beginning in the 1990’s CBT has been proven to be efficacious for adolescents with diagnosed depressive disorders, specifically Major Depressive Disorder (MDD). A series of increasingly challenging and methodologically rigorous trials showed that CBT was an effective intervention for mild to moderate MDD, and enhanced the benefits of anti-depressant medication, even for those adolescents who had already failed to respond to an initial medication. Simultaneously, some limitations of CBT were suggested by these studies. Results of CBT alone were not encouraging with severely depressed adolescents, and the combination of CBT plus medication was not uniformly supported. As CBT investigators worked with more challenging, complex clinical cases, such as depressed adolescents who were abusing substances or engaging in suicidal or self-harm behaviors, standard components of CBT were augmented by increased emphasis placed on emotion regulation, safety planning, and by more intensive outpatient treatment models. Newer developments include “third wave” models, which have shown initial promise.     

GazeAlyze: a MATLAB toolbox for the analysis of eye movement data

This article presents GazeAlyze, a software package, written as a MATLAB (MathWorks Inc., Natick, MA) toolbox developed for the analysis of eye movement data. GazeAlyze was developed for the batch processing of multiple data files and was designed as a framework with extendable modules. GazeAlyze encompasses the main functions of the entire processing queue of eye movement data to static visual stimuli. This includes detecting and filtering artifacts, detecting events, generating regions of interest, generating spread sheets for further statistical analysis, and providing methods for the visualization of results, such as path plots and fixation heat maps. All functions can be controlled through graphical user interfaces. GazeAlyze includes functions for correcting eye movement data for the displacement of the head relative to the camera after calibration in fixed head mounts. The preprocessing and event detection methods in GazeAlyze are based on the software ILAB 3.6.8 Gitelman (Behav Res Methods Instrum Comput 34(4), 605-612, 2002). GazeAlyze is distributed free of charge under the terms of the GNU public license and allows code modifications to be made so that the program's performance can be adjusted according to a user's scientific requirements.     

Plasticity of prospective memory through a familiarization intervention in old adults

Younger adults consistently outperform older adults in laboratory prospective memory tasks. This study examines the effectiveness of an intervention that familiarizes older adults with the sequence of ongoing events to compensate their reduced prospective memory performance. We compared performance and electrophysiological measures of an intervention group (N = 20, 69-83 years) receiving a familiarization intervention to an individually matched control group (N = 20). As ongoing activity a 2-back working memory task was administered. Neural correlates were studied using event related potentials (ERPs) and source localization (standardized low-resolution brain electromagnetic tomography). Behavioural data showed faster reaction times in correct prospective trials and fewer prospective false alarms in the familiarization intervention group. ERP analyses displayed differential patterns for the two groups and source localization measures distinctively presented group differences in prospective memory trials with the control group recruiting more resources for a successful prospective memory performance. Together our data support the hypothesis that the familiarity with the sequence of ongoing events increases prospective memory performance and that this might be based on a higher efficiency of attentional monitoring resources and evaluation processes in the intervention group.     

Role of Informal Integration in Career Advancement: Investigations in Plural and Multicultural Organizations and Implications for Diversity Valuation

The major question which this research examinedis whether informal integration is likely to result incareer advancement and perceived resources within twodifferent organizational contexts (plural and multicultural). Specifically, we examinedinteractions of race, gender, and organization type onthe above two outcome variables. In pluralorganizations, employees are expected to assimilate intothe dominant culture, while in multicultural organizations,cultural change for the individual and the organizationis reciprocal. Hypotheses were tested with a combinedsample of 101 men, 35 women, 29 persons of color, and 107 whites. Results indicated that,congruent with predictions, greater social integrationoccurred in an organizational context in which valuingdifferences was a priority. Further, the influence of informal integration on career advancement wasstill important even after controlling for suchvariables as age, organizational tenure, education, andhierarchical level within the organization. Implications of these findings for valuing diversity arediscussed.     

The regression trunk approach to discover treatment covariate interaction

The regression trunk approach (RTA) is an integration of regression trees and multiple linear regression analysis. In this paper RTA is used to discover treatment covariate interactions, in the regression of one continuous variable on a treatment variable withmultiple covariates. The performance of RTA is compared to the classical method of forward stepwise regression. The results of two simulation studies, in which the true interactions are modeled as threshold interactions, show that RTA detects the interactions in a higher number of cases (82.3% in the first simulation study, and 52.3% in the second) than stepwise regression (56.5% and 20.5%). In a real data example the final RTA model has a higher cross-validated variance-accounted-for (29.8%) than the stepwise regression model (12.5%). All of these results indicate that RTA is a promising alternative method for demonstrating differential effectiveness of treatments. Supported by The Netherlands Organization for Scientific Research (NWO), grant 030-56403 to Jacqueline Meulman for the Pioneer project “Subject-Oriented Multivariate Analysis,” and grant 451-02-058 to Elise Dusseldorp for the Veni project “Modeling interaction effects as small trees in regression and classification.” We thank Bram Bakker for making the data of his doctoral dissertation available, and David Hand, Jerome Friedman, Bart Jan van Os, Philip Spinhoven, and the anonymous reviewers for their helpful suggestions. Special thanks are due to Lawrence Hubert.     

Short- and Long-Term Impact of Receiving Genetic Mutation Results in Women at Increased Risk for Hereditary Breast Cancer

Forty-seven unaffected women from high-risk breast cancer families who had received results for hereditary breast/ovarian predisposition genes between 1 month and 5 years ago were interviewed regarding their experiences. Women responded to open-ended questions. The initial emotional turmoil reported by most was generally short lived. However, the impact of genetic testing went beyond the individual to the extended family and social context, particularly in the short-term. A common theme was the difficulty associated with divulging a result to family members, who were also adjusting to their own result. The majority of carriers reported advantages that were both physical (options for surveillance programs and prophylactic surgery) and emotional (reduced uncertainty, increased awareness of options and knowledge about risk, preparation time). Most carriers reported no change in lifestyle although some reported discovering their mutation status as a positive life-changing experience. Implications for genetic counseling and further research are discussed.