False-Positive Psychology Tập 22 Số 11 - Trang 1359-1366 - 2011
Joseph P. Simmons, Leif D. Nelson, Uri Simonsohn
In this article, we accomplish two things. First, we show that despite empirical psychologists’ nominal endorsement of a low rate of false-positive findings (≤ .05), flexibility in data collection, analysis, and reporting dramatically increases actual false-positive rates. In many cases, a researcher is more likely to falsely find evidence that an effect exists than to correctly find evid...... hiện toàn bộ A Neural System for Error Detection and Compensation Tập 4 Số 6 - Trang 385-390 - 1993
William J. Gehring, Brian Michael Goss, Michael Coles, David E. Meyer, Emanuel Donchin
Humans can monitor actions and compensate for errors. Analysis of the human event-related brain potentials (ERPs) accompanying errors provides evidence for a neural process whose activity is specifically associated with monitoring and compensating for erroneous behavior. This error-related activity is enhanced when subjects strive for accurate performance but is diminished when response s...... hiện toàn bộ Required Sample Size to Detect the Mediated Effect Tập 18 Số 3 - Trang 233-239 - 2007
Matthew S. Fritz, David P. MacKinnon
Mediation models are widely used, and there are many tests of the mediated effect. One of the most common questions that researchers have when planning mediation studies is, “How many subjects do I need to achieve adequate power when testing for mediation?” This article presents the necessary sample sizes for six of the most common and the most recommended tests of mediation for various c...... hiện toàn bộ Fitness Effects on the Cognitive Function of Older Adults Tập 14 Số 2 - Trang 125-130 - 2003
Stanley J. Colcombe, Arthur F. Kramer
A meta-analytic study was conducted to examine the hypothesis that aerobic fitness training enhances the cognitive vitality of healthy but sedentary older adults. Eighteen intervention studies published between 1966 and 2001 were entered into the analysis. Several theoretically and practically important results were obtained. Most important, fitness training was found to have robust but se...... hiện toàn bộ Positive Emotions Trigger Upward Spirals Toward Emotional Well-Being Tập 13 Số 2 - Trang 172-175 - 2002
Barbara L. Fredrickson, Thomas E. Joiner
The broaden-and-build theory of positive emotions predicts that positive emotions broaden the scopes of attention and cognition, and, by consequence, initiate upward spirals toward increasing emotional well-being. The present study assessed this prediction by testing whether positive affect and broad-minded coping reciprocally and prospectively predict one another. One hundred thirty-eigh...... hiện toàn bộ Very Happy People Tập 13 Số 1 - Trang 81-84 - 2002
Ed Diener, Martin E. P. Seligman
A sample of 222 undergraduates was screened for high happiness using multiple confirming assessment filters. We compared the upper 10% of consistently very happy people with average and very unhappy people. The very happy people were highly social, and had stronger romantic and other social relationships than less happy groups. They were more extroverted, more agreeable, and less neurotic...... hiện toàn bộ Self-Discipline Outdoes IQ in Predicting Academic Performance of Adolescents Tập 16 Số 12 - Trang 939-944 - 2005
Angela Duckworth, Martin E. P. Seligman
In a longitudinal study of 140 eighth-grade students, self-discipline measured by self-report, parent report, teacher report, and monetary choice questionnaires in the fall predicted final grades, school attendance, standardized achievement-test scores, and selection into a competitive high school program the following spring. In a replication with 164 eighth graders, a behavioral delay-o...... hiện toàn bộ Modeling Response Times for Two-Choice Decisions Tập 9 Số 5 - Trang 347-356 - 1998
Roger Ratcliff, Jeffrey N. Rouder
The diffusion model for two-choice real-time decisions is applied to four psychophysical tasks. The model reveals how stimulus information guides decisions and shows how the information is processed through time to yield sometimes correct and sometimes incorrect decisions. Rapid two-choice decisions yield multiple empirical measures: response times for correct and error responses, the pro...... hiện toàn bộ Impulsivity and Inhibitory Control Tập 8 Số 1 - Trang 60-64 - 1997
Gordon D. Logan, Russell A. Barkley, Rosemary Tannock
We report an experiment testing the hypothesis that impulsive behavior reflects a deficit in the ability to inhibit prepotent responses Specifically, we examined whether impulsive people respond more slowly to signals to inhibit (stop signals) than non-impulsive people In this experiment, 136 undergraduate students completed an impulsivity questionnaire and then participated in a stop-sig...... hiện toàn bộ