Digital Commons Network^™

Methylphenidate Effects On The Learning And Performance Of Four Hyper Active Children, Paul James Yoder

Dissertations

The effects of methylphenidate hydrochloride (Ritalin) on the learning and performance of four hyperactive children were evaluated using a repeated acquisition procedure with both learning and performance components. Three dosages of methylphenidate plus a placebo were evaluated under double-blind experimental conditions. Dosages treated included each subject's therapeutic dosage, a dosage 5 milligrams higher, and a dosage 5 milligrams lower. Methylphenidate produced no effect on either the number of errors per session or on the rate of responding across the range of dosages tested suggesting that the medication neither facilitated nor impaired learning or performance. Data were also collected on social …

The Effect Of Aerobic Training And Weight Training On The Cardiorespiratory Fitness, Body Cathexis, And Self-Concept Of College Females, John Stuart Irvine

Dissertations

The present study investigated the effects of two differing exercise programs, aerobic training and weight training, upon the body cathexis, global self-concept, and cardiorespiratory fitness of college females. The subjects were undergraduate nonintercollegiate athletes who self-selected into four different physical education classes that served as the two experimental and one control group. The subjects in the aerobics exercise group engaged in rope jumping, aerobic dance, and jogging for 50 minutes, twice per week, for 14 weeks. The weight training experimental group utilized free weights and variable resistence strength training equipment during the 14-week, twice weekly, 50-minute sessions. The control group …

Computer-Assisted Consultation: Problem-Identification, David B. Lennox

Dissertations

Three experiments were conducted to validate the effectiveness of Computer-Assisted Consultation (CAC)--a computer-based problem identification interviewing system for use in conducting school-based behavioral consultation. The specific goals of problem identification are to establish behavioral objectives and initial assessment characteristics. Experiment I functioned as a pilot which: (1) validated the need for problem identification, (2) demonstrated the general utility of CAC, and (3) provide a basis for program improvement. Experiment II provided a more rigorous analysis of CAC by comparing it with an actual problem identification interview. Two groups of three consultees each were exposed to one of two counter-balanced sequences …

Feminine Role Orientation And Locus Of Control In Battered Women, Nancy C. Zielke

Dissertations

The purpose of this study was to examine locus of control and feminine role orientation in battered women. It was hypothesized that battered women would have a more "external" locus of control than women who have not been in a battering relationship. It was also hypothesized that battered women would describe themselves as having more characteristics that are traditionally associated as "feminine" in nature and fewer characteristics that are considered "masculine" in nature than women who have not been in a battering relationship. Finally, it was hypothesized that there would be a relationship between locus of control and self-perceived feminine …

The Delay-Reduction Hypothesis Of Evocative Effectiveness And Latency, James Bryant Nuzzo

Dissertations

Prior studies found that separations between latencies correlated with differential stimuli in a multiple discrete trial procedure were attenuated with increased intertrial interval durations. In this study six pigeons served as subjects in two groups. The procedure for one group was a multiple DRO-FR chain schedule (Ratio Delay group) while in the other group a multiple DRO - response-initiated delay interval chain schedule (Time Delay group) was used. Results of this study are consistent with the Delay-reduction hypothesis of evocative effectiveness which predicts that with increasing initial link durations relative terminal link evocative effectiveness would decrease. Specifically, relative terminal link …

Stimulus-Reinforcer And Response-Reinforcer Relationships In The Determination Of Response Latency, Bruce Edward Hesse

Dissertations

Response latency is measured from the onset of a stimulus to the onset of a response and is relevant to both respondent and operant control procedures. Previous research has shown response latency to be a sensitive operant dependent variable but the contribution of respondent influences was not known. The present experiment used pigeons, a two-key procedure and a two component FR schedule to study the respondent (stimulus-reinforcer) contributions to the determination of an ostensibly operant response latency. Stimuli associated with each FR component were displayed on one key (stimulus key) while responding for reinforcement was required on a second key …

Effects Of Tripelennamine And Pentazocine Alone And In Combination On Schedule-Controlled Performance, Deborah Lou Grossett

Dissertations

The effects of tripelennamine (3, 6, 12, 18, and 24 mg/kg) and pentazocine (5, 10, 20, 30, and 40 mg/kg), given alone and in selected combinations, were determined in rats performing under fixed-ratio 30 and interresponse-time-greater-than-15-second schedules of food delivery. When given alone, tripelennamine and pentazocine produced statistically significant decreases in responding under the fixed-ratio 30 schedule, but did not significantly affect responding under the interresponse-time-greater-than-15-second schedule. Each drug alone significantly decreased the number of reinforcers (food pellets) earned relative to control values under both schedules. The effects of the two drugs in combination were supra-additive. That is, the effects …

The Psychological Aspects Of Loneliness Experienced By College Students, Jerie Kull Wood

Dissertations

Loneliness is a common problem that occurs at various life stages, but is most intense for college students. To clarify and operationalize the concepts of loneliness, several current sociological and psychological approaches to loneliness were critically examined.

The major purposes of this study were to identify the lonely among the student population, the types of loneliness they experience, the behavioral manifestations of that loneliness, and the effectiveness of an intervention method. The Belcher Extended Loneliness Scale as administered to 126 students in a pretest and 203 students in a posttest. The students also answered questions about grade point average and …

Effects Of Anticonvulsant Drugs On Learning And Memory, Mitchell Jon Picker

Dissertations

The effects of phenobarbital, clonazepam, valproic acid, phenytoin, and ethosuximide were examined in pigeons performing under repeated acquisition of response chains and delayed matching-to-sample procedures. In experiment I, clonazepam, valproic acid, ethosuximide, and phenytoin produced generally dose-dependent increases in rate of responding, while phenobarbital had little consistent effect on response rate across the dose range studied. Phenobarbital and clonazepam produced dose-dependent increases in error rates (i.e., learning impairment). Although valproic acid and phenytoin generally increased error rates relative to control values, this effect was not directly dose-dependent or consistent across subjects. In contrast to the other anticonvulsants examined, ethosuximide had …