Rates of primary production and community metabolism were monitored over a one year period using the diurnal oxygen method. Certain physico-chemical parameters were also measured, and autotrophic standing crops were estimated. An in-depth study was made of the phytoplankton community and various diversity indicies were calculated. Simple correlations were run between all parameters measured (biotic and abiotic), and their inter-relationships examined. Multiple linear regression analyses were used to develop equations predictive of production and community metabolism. Bluegreen algae were the dominant phytoplankters with blooms occurring in late summer and fall. Yearly mean production was approximately 21 kcal per meter square per day with a mean photosynthetic efficiency of 1.2 per cent. Of the various parameters measured turbidity and water temperature were most important in determining rates of primary production.

The problem of the investigation was to determine the knowledge gain and the attitude change in females attending a contraception education program conducted by the Denton County Chapter of the Planned Parenthood Association of Northeast Texas. The sample population consisted of 75 females attending a Planned Parenthood contraception education program. A pre-test, post-test, and delayed test format was utilized in the study. The study concluded that the contraception education program did not significantly increase contraception knowledge of females attending Planned Parenthood. The investigation also concluded that the program did not significantly change the contraception attitudes of females in the investigation. However, there was a significant contraception knowledge gain one month following initial program exposure.

This study investigated the value of headache presence during elecromyographic (EMG) feedback relaxation training and the contribution made by home relaxation practice in the elimination of tension headache. Eighteen participants, mainly coeds in their twenties, recorded headache and medication data for two baseline weeks, and were assigned to one of three training groups. Group A received EMG feedback training with headache presence during the session and home relaxation practice. Group B received EMG feedback without headache Presence and home practice. Group C received only home relaxation practice. Statistically significant treatment differences were not found, but declining trends of headache activity and medication use tend to support the efficacy of EMG training with headache presence.

A fifty-item questionnaire, representing personality attributes related to behaviors used to index the phenomenon of learned helplessness, was administered to 152 undergraduate students. Based upon factor analysis of the results, six subscales were developed to predict latency of response, failures to solve, and trials to task criterion of anagram solving, this being used to index the phenomenon of learned helplessness. The subscales comprised a ninety-item questionnaire given to seventy-seven undergraduate students three days before participation in the experiment proper. The subjects attempted to solve Levine (1971) discrimination problems (designed to be insolvable) and then attempted to solve patterned anagrams. Contrary to the learned helpless model of depression (Miller and Seligman, 1973), depression was curvilinearly related to latency of response and failures to solve in the anagram task. In addition, internal locus of control was linearly related to trials to criterion.

The purposes of the study were (1) to determine if differences exist between the self concepts of female intercollegiate starting and substitute athletes and between members of team and individual sports and (2) to determine if a significant relationship exists between coaches' ratings of an athlete and the athletes' self concepts. Subjects were forty-five college women who met the established criteria. The testing instrument was the Tennessee Self Concept Scale. Data were analyzed by the two-way analysis of variance method and the Spearman Rank Order Correlation. Alpha was .05. Conclusions of the investigation were that (1) the self concepts of athletes in basketball, softball, volleyball, tennis, and badminton are not significantly different, and (2) the coaches' ratings of athletes and athletes' self concept ratings are not significantly related.

This investigation was designed to determine relative effects of monetary reward and knowledge of results on complex-choice reaction time tasks. Subjects were twenty-five male and thirty-two female undergraduate students. Apparatus consisted of nine stimulus lights and eight response keys. Subjects were required to add the number of lights presented, subtract the sum from a constant, and press the correctly numbered response key. Reward subjects received twenty-five cents for responses faster than a predetermined criterion, and twenty-five cents was deducted for slower responses. Knowledge of results subjects were told their reaction times after each trial. Results indicated (1) no significant differences between any conditions, (2) a significant overall practice effect (.01 level), and (3) that males were significantly faster than females (.01 level).