Are models necessary?

Modelling is currently one of the most successful and popular ways of dealing with some neurotic problems. It is based on a social learning theory that amongst other virtues takes into account cognitive variables. helps shed light on the aetiology of some neurotic disorders (Rachman. 1972). and seems particularly relevant to the understanding of much child behaviour.The technique of the modelling treatment has been refined over the years, largely through the work of Bandura, and the contention to date has been that behavioural improvement is brought about by vicarious processes (Bandura, 1969). However, since a modelling procedure by necessity involves exposure to a phobic object it is possible that vicarious processes are in fact redundant and that improvement is affected by ‘straightforward’ extinction processes. In short the contention is that interaction with a model disguises the fact that the modelling situation is no more than a modified flooding session. In one of the few studies to test this hypothesis Bandura, Grusec and Menlove (1967) found that exposure alone resulted in some gains for dog-phobic children, but that these changes were neither as great nor as stable as those achieved by similar children in a modelling treatment. Other indirect evidence for this hypothesis can be found by-relating the amount of exposure to the phobic object to outcome in modelling studies. Despite obvious difficulties in cross-trial comparison, rate of success for longer exposure treatments would constitute some support, albeit very tentative, for this hypothesis. Unfortunately, few of the studies contained enough reliable information on the relevant variables to reveal much. Bandura et al. (1967) used 80 min of exposure in all, with success rates of 70%, whilst less exposure time resulted in worse outcome in studies by Spiegler et al. (1969) and Ritter (1969). However, against this, Hill et al. (1968) and Rimm and Mahoney (1969) both report good results with brief participant modelling. The fact that participant modelling seems to be more beneficial than symbolic modelling, may be regarded as some support for the exposure hypothesis, since presumably exposure in these cases is more intense.However, these studies are largely indirect and one test of the hypothesis requires a comparison between groups one of which is exposed to both phobic object and model interaction (symbolic modelling) and one of which is exposed just to the phobic object.     

Alcohol dependence and the priming effect.

The concepts of loss of control and craving are reviewed and relevant experimental findings are discussed. Speed of drinking is proposed as a behavioural measure of craving and an experiment is described to test the hypothesis that craving is primed by a moderate dose of alcohol (45 gm). The hypothesis was confirmed, but only for the severely dependent alcoholics. The results indicated that the behavioural measure of craving and the assessment of severity of dependence were crucial. Failure to measure either of them would have resulted in failure to identify a priming effect.     

Semantic sensitivity for prose in patients with probable alzheimer's disease

This study examined the sensitivity of patients with probable Alzheimer's Disease (AD) to the inherent semantic structure of prose. Patients and normal controls listened to prose passages and recalled the stories under immediate and delayed conditions. Subjects were also tested with a recognition format. Unlike controls and patients with mild AD, patients with severe AD were unable to differentiate high importance ideas from ideas of lower importance on free recall and recognition. These results suggest relative impairment of semantic processing at the encoding and consolidation process of memory in more advanced AD.     

Correlates of household smoking bans in low-income families of children with and without asthma

Exposure to secondhand smoke (SHS) harms all children's health, especially children with asthma. Yet, children with asthma are as likely to live with smokers as healthy children. Household smoking bans are being advocated to reduce children's harm from SHS. To measure the effect of household smoking bans on child SHS exposure and to examine correlates of strict smoking bans in a low-income, diverse sample, 91 children with asthma were matched to 91 healthy children. All had at least one smoker living in their homes. Nicotine dosimeters, child cotinine assays, and maternal reports quantified child SHS exposures. Maternal reports of household smoking rules, behaviors, and beliefs, and other family characteristics were also gathered. The presence of a strict household smoking ban vastly reduced children's SHS exposures and was associated with fewer cigarettes smoked by the mother and by other family members, the belief that SHS was a personal health risk, having children with asthma, and living in a single-family home. Many children are exposed to high levels of SHS at home. Strict household smoking bans greatly decrease, but do not eliminate children's SHS exposure. Even in disadvantaged families, mutable factors were associated with strict smoking bans. Increased dissemination and use of established public health strategies are needed to reduce children's SHS exposures.