The aim of this work is to give a coherent account of experiments designed and carried out to try to illuminate our knowledge of the behavior of humans under conditions of isolation. The particular emphasis will be on susceptibility to…

This historical introduction would have to be greatly extended if it were to deal with the details of the anatomical and physiological developments that led to our present knowledge of the reticular activating or arousal system. Recognition of its significance…

The study of the effects of sleep loss in animals has been a neglected area of research. If sleep is a basic need, then the deprivation of sleep, as the deprivation of any basic need, should lead to certain physiological…

This thesis concerns the question of intellectual loss in schizophrenia. To obtain evidence of such loss, the investigator must demonstrate that an individual with schizophrenia has a lower intelligence than he had at a time when the disorder was presumably…

Our conception of the physiological bases underlying motivated behavior have been profoundly altered since the time of William James’ discussion of “no special brain centers for emotion” and his claim that the analysis was simpler than physiologists imagined (1890). The…

The subjective judgment of pain is a perceptual task in which the outcome of the judgment bears a complex relationship to the measured intensity of the physical stimulus applied. “ln many cases knowledge of what is happening at the periphery…

The reticular activating system has attracted the interest of psychologists for more than a decade. Theories have been developed, and the concept of arousal has become quite popular in a number of fields of psychology. There are, however, not many…

While a number of studies have been concerned with the fears of children of various ages, little seems to be known about the objects end situations that are feared by adolescents and young adults. The present study is aimed at…