Physical Fitness as a moderator of cognitive work capacity and fatigue onset under sustained combat-like operations

A study was devised to investigate the role of physical fitness in moderating both cognitive work capacity and fatigue onset under sustained combat operations. Sixteen male ROTC cadets were followed through a 2.5-day, Pre Ranger Evaluation exercise. Prior to the start of the exercise, the cadets’ overall level of physical fitness was assessed by using five fitness indices (Harvard Step Test, chin-ups, push-ups, sit-ups, and two-mile run). Cognitive performance and subjective measures of fatigue state were assessed at regular intervals before, during, and 1 day after the exercise. The results suggest that fitness may attenuate decrements in cognitive work capacity for certain tasks requiring prolonged mental effort, particularly as the cumulative effects of sleep loss and other stressors begin to mount. Similarly, the results suggest that as overall stress levels increase, fitness may have a beneficial effect in moderating fatigue rate. Fitness did not significantly enhance the recovery process with respect to cognitive work capacity, and actually appeared to hinder recovery from fatigue.     

The effect of methyl parathion on susceptibility of bobwhite quail (Colinus virginianus) to domestic cat predation

Bobwhite quail (Colinus virginianus) that received either 0, 2, 4, or 8 mg/kg methyl parathion (O,O-dimethyl o-p-nitrophenyl phosphorothioate) treatment were investigated as to their susceptibility to predation by a cat (Felis domesticus) predator. Four hours after receiving methyl parathion (MP), physical activity levels were monitored in quail and included the number of seconds spent still, walking, running, or flying before and after a cat was introduced into an experimental arena. The cholinesterase (ChE) activity for each quail on experiment was determined. Quail that were captured exhibited significantly greater inhibition of brain ChE activity and spent significantly more time being still than noncaptured birds. Birds receiving MP at 8 mg/kg spent more seconds being still than those in other treatment groups and had ChE activity reduced to 42.8% of normal activity. There was a tendency for quail at increasing treatment levels to be more susceptible to capture by the cat predator. The neurological and behavioral effects of methyl parathion may have important ecological ramifications.     

THE RELATION OF SELFEFFICACY AND ASSERTIVENESS TO WILLINGNESS TO ENGAGE IN TRADITIONAL/NONTRADITIONAL CAREER ACTIVITIES

The relation of self-efficacy and assertiveness to the willingness of women to engage in traditional or nontraditional career activities was studied. One hundred and twenty-two undergraduate females took the Career Decision-Making Self-Efficacy Scale (Taylor & Betz, 1983) and the Assertive Behavior Assessment for Women (Osborn & Harris, 1975) and were asked to rate their willingness to engage in the career-related activities of ten traditional and ten nontraditional occupations for women. Strong self-efficacy expectations and assertiveness were related to the willingness to engage in the career-related activities of nontraditional occupations, but not traditional ones. However, regardless of level of self-efficacy or of assertiveness, women were more willing to engage in the career-related activities of traditional occupations. Implications of the results for career counseling are discussed.