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Peer reviewed
Direct linkvon Eye, Alexander; DeShon, Richard P. – International Journal of Behavioral Development, 2012
In this article, we discuss and propose methods that may be of use to determine direction of dependence in non-normally distributed variables. First, it is shown that standard regression analysis is unable to distinguish between explanatory and response variables. Then, skewness and kurtosis are discussed as tools to assess deviation from…
Descriptors: Violence, Attention Deficit Hyperactivity Disorder, Predictor Variables, Correlation
Bradshaw, Ceri A.; Reed, Phil – Learning and Motivation, 2012
In three experiments, human participants pressed the space bar on a computer keyboard to earn points on random-ratio (RR) and random-interval (RI) schedules of reinforcement. Verbalized contingency awareness (CA) for each schedule was measured after the entire task (Experiments 1 and 2), or after each RR-RI trial (Experiment 3). In all three…
Descriptors: Intervals, Reinforcement, Computers, Task Analysis
Download full textBorrero, John C.; Bartels-Meints, Jamie A.; Sy, Jolene R.; Francisco, Monica T. – Journal of Applied Behavior Analysis, 2011
We evaluated the effects of fixed-interval (FI), fixed-time (FT), and conjoint (combined) FI FT reinforcement schedules on the responding of 3 adults who had been diagnosed with schizophrenia. Responding on vocational tasks decreased for 2 of 3 participants under FT alone relative to FI alone. Responding under FI FT resulted in response…
Descriptors: Behavior Problems, Schizophrenia, Caregivers, Intervals
Culpepper, Robert A. – Journal of Vocational Behavior, 2011
SEM (N = 182) was employed to examine implied temporal aspects of three-component commitment theory as they relate to turnover. Consistent with expectations, affective commitment predicted subsequent turnover in an immediate and relatively short interval of 4 months, but failed to do in a much longer but outlying interval of 5-12 months. Side bet…
Descriptors: Employees, Intervals, Job Satisfaction, Predictor Variables
Ngan, Chun-Kit – ProQuest LLC, 2013
Making decisions over multivariate time series is an important topic which has gained significant interest in the past decade. A time series is a sequence of data points which are measured and ordered over uniform time intervals. A multivariate time series is a set of multiple, related time series in a particular domain in which domain experts…
Descriptors: Multivariate Analysis, Time, Intervals, Decision Making
Lowe, Michael R.; Berner, Laura A.; Swanson, Sonja A.; Clark, Vicki L.; Eddy, Kamryn T.; Franko, Debra L.; Shaw, Jena A.; Ross, Stephanie; Herzog, David B. – Journal of Consulting and Clinical Psychology, 2011
Objective: To investigate whether, at study entry, (a) weight suppression (WS), the difference between highest past adult weight and current weight, prospectively predicts time to first full remission from bulimia nervosa (BN) over a follow-up period of 8 years, and (b) weight change over time mediates the relationship between WS and time to first…
Descriptors: Intervals, Females, Eating Disorders, Body Weight
Rosch, Keri Shiels; Dirlikov, Benjamin; Mostofsky, Stewart H. – Journal of Abnormal Child Psychology, 2013
Increased intrasubject variability (ISV), or short-term, within-person fluctuations in behavioral performance is consistently found in Attention-Deficit/Hyperactivity Disorder (ADHD). ADHD is also associated with impairments in motor control, particularly in boys. The results of the few studies that have examined variability in self-generated…
Descriptors: Motor Reactions, Psychomotor Skills, Attention Deficit Hyperactivity Disorder, Males
Bijttebier, Patricia; Raes, Filip; Vasey, Michael W.; Feldman, Gregory C. – Journal of Abnormal Child Psychology, 2012
Rumination to negative affect has been linked to the onset and maintenance of mood disorders in adults as well as children. Responses to positive affect have received far less attention thus far. A few recent studies in adults suggest that responses to positive affect are involved in the development of both depressive and hypomanic symptoms, but…
Descriptors: Intervals, Measures (Individuals), Depression (Psychology), Affective Behavior
Curtis, Dan – College Mathematics Journal, 2010
This article gives a simple method for determining the maximum interval of existence for a solution of a single, autonomous, first-order differential equation as well as the behavior of the solution as the independent variable approaches the ends of the interval. The methods used are elementary enough to be included in an introductory differential…
Descriptors: Intervals, Predictor Variables, Calculus, Mathematics Instruction
DeCastro, Jeanette E. – ProQuest LLC, 2012
Accurate prediction of which candidates show the most promise of success in dental school is imperative for the candidates, the profession, and the public. Several studies suggested that predental GPAs and the Dental Admissions Test (DAT) produce a range of correlations with dental school performance measures. While there have been similarities,…
Descriptors: Meta Analysis, Dental Schools, Medical Students, Predictor Variables
Roberts, Jane E.; Tonnsen, Bridgette; Robinson, Ashley; Shinkareva, Svetlana V. – American Journal on Intellectual and Developmental Disabilities, 2012
The present study contrasted physiological arousal in infants and toddlers with fragile X syndrome to typically developing control participants and examined physiological predictors early in development to autism severity later in development in fragile X syndrome. Thirty-one males with fragile X syndrome (ages 8-40 months) and 25 age-matched…
Descriptors: Intervals, Mental Retardation, Autism, Toddlers
Spencer, Elizabeth; Craig, Hugh; Ferguson, Alison; Colyvas, Kim – Clinical Linguistics & Phonetics, 2012
This study investigated the stability of propositional density (PD) in written texts, as this aspect of language shows promise as an indicator and as a predictor of language decline with ageing. This descriptive longitudinal study analysed written texts obtained from the Australian Longitudinal Study of Women's Health in which participants were…
Descriptors: Language Usage, Intervals, Females, Written Language
Eden, Sigal; Ingber, Sara – American Annals of the Deaf, 2014
The study examined the efficacy of an early intervention program to improve children's sequential time perception through virtual versus pictorial training in arranging episodes of temporal scripts. The researchers examined 65 deaf and hard of hearing children ages 4-7 years who were divided into two groups: (a) virtual environments technological…
Descriptors: Virtual Classrooms, Deafness, Partial Hearing, Early Intervention
Boswell, M. Alison; Knight, Victoria; Spriggs, Amy D. – Rural Special Education Quarterly, 2013
This investigation used an ABAB withdrawal design to determine the effect of self-monitoring using the MotivAider® (MotivAider, 2000) on percentage of intervals of on-task behavior by an 11-year old male with a moderate intellectual disability who attended a rural middle school. The MotivAider® is a small device, the size of a pager, which can be…
Descriptors: Middle School Students, Moderate Intellectual Disability, Task Analysis, Self Management
Axelson, David A.; Birmaher, Boris; Strober, Michael A.; Goldstein, Benjamin I.; Ha, Wonho; Gill, Mary Kay; Goldstein, Tina R.; Yen, Shirley; Hower, Heather; Hunt, Jeffrey I.; Liao, Fangzi; Iyengar, Satish; Dickstein, Daniel; Kim, Eunice; Ryan, Neal D.; Frankel, Erica; Keller, Martin B. – Journal of the American Academy of Child & Adolescent Psychiatry, 2011
Objective: To determine the rate of diagnostic conversion from an operationalized diagnosis of bipolar disorder not otherwise specified (BP-NOS) to bipolar I disorder (BP-I) or bipolar II disorder (BP-II) in youth over prospective follow-up and to identify factors associated with conversion. Method: Subjects were 140 children and adolescents…
Descriptors: Intervals, At Risk Persons, Adolescents, Mental Disorders
