Book Reviews

The American Journal of Psychoanalysis -     

Sex-role stereotypes of feminists and nonfeminists

In light of recent attempts by feminists to upgrade the status of women by stressing the positive aspects of femininity, a comparison of sex-role stereotyping by women who endorse women's liberation with those who do not was made. Feminists showed a more positive perception of women; both groups stressed positive feminine traits in describing an ideal woman, but feminists would like to see more dominance in women. Two negative stereotypes, not previously documented, emerged from this analysis: the depiction of men as cooler, more boastful, awkward, and insensitive by the feminists and women's liberationists as more boastful, excitable, and unattractive by the nonfeminists.     

On the form of psychometric functions for taste

Psychometric functions were determined for the discrimination of weak solutions of quinine hydrochloride or of hydrochloric acid from distilled water. The slopes of these functions were compared with those of some functions previously determined for sodium chloride and for sucrose. In general, the functions for QHCl were the least steep and those for NaCl were the most steep, but the differences were not great. Thus, it appears that the psychometric functions for these different taste qualities have substantially the same form, even though absolute sensitivity varies over several orders of magnitude.     

Modulation of Taste Aversions by a Pentobarbital Drug State: An Assessment of Its Transfer Properties

In a drug-discrimination procedure using conditioned taste aversions, a pentobarbital injection signaled a taste–toxin pairing while the vehicle injection signaled the same taste in the absence of the toxin. In transfer tests, drug states transferred control over consumption to other targets. If the training target was a fluid (saccharin), then transfer occurred to other fluids (both novel and familiar) but not to solid food. If the training target was food, then some transfer occurred to novel targets (both fluids and solid food) but not to familiar targets. Control rats revealed that the differential consumption seen during acquisition and during transfer tests was not due to the summation of two simple associations (i.e., drug–toxin and flavor–toxin) but rather reflected conditional control over consumption by the drug state.     

Application of chaos theory to biology and medicine

The application of “chaos theory” to the physical and chemical sciences has resolved some long-standing problems, such as how to calculate a turbulent event in fluid dynamics or how to quantify the pathway of a molecule during Brownian motion. Biology and medicine also have unresolved problems, such as how to predict the occurrence of lethal arrhythmias or epileptic seizures. The quantification of a chaotic system, such as the nervous system, can occur by calculating the correlation dimension (D2) of a sample of the data that the system generates. For biological systems, the point correlation dimension (PD2) has an advantage in that it does not presume stationarity of the data, as the D2 algorithm must, and thus can track the transient non-stationarities that occur when the systems changes state. Such non-stationarities arise during normal functioning (e.g., during an event-related potential) or in pathology (e.g., in epilepsy or cardiac arrhythmogenesis). When stochastic analyses, such as the standard deviation or power spectrum, are performed on the same data they often have a reduced sensitivity and specifity compared to the dimensional measures. For example, a reduced standard deviation of heartbeat intervals can predict increased mortality in a group of cardiac subjects, each of which has a reduced standard deviation, but it cannot specify which individuals will or will not manifest lethal arrhythmogenesis; in contrast, the PD2 of the very same data can specify which patients will manifest sudden death. The explanation for the greater sensitivity and specificity of the dimensional measures is that they aredeterministic, and thus are moreaccurate in quantifying the time-series. This accuracy appears to be significant in detecting pathology in biological systems, and thus the use of deterministic measures may lead to breakthroughs in the diagnosis and treatment of some medical disorders.     

The Impact of a Leader Model on High Dominant Women’s Self-Selection for Leadership

The present study examined how the gender of a leader model affected high dominant women’s decisions to become leaders when instructed to complete a masculine-typed task and paired with a man. One hundred ninety undergraduates at a university in the southeastern United States were paired according to Dominance scores and shown the task, which required a leader and a follower. Pairs were presented with either a female or male leader model. Independent observers recorded who became the leader. Results suggest that when high dominant women are presented with a female leader model, they are more likely to take on the leadership role in the presence of a male partner than when they are presented with a male leader model.