Factors Influencing the Development of Psychology in Latin America

Among the factors impeding the development of the discipline of psychology in Latin America, emphasis must be given to the lack of infrastructural conditions. Also important is the lack of social, economic, and political stability, leading to inadequate administrative and financial support for research. The high degree of uncertainty as to the future of societal outcomes leads to short-term planning, and weakens the possibility of sustained lines of research. Yet, the same economic and political crises have positive consequences: A growing awareness of social problems and a realization of the utility of psychology in their solutions. The resultant job opportunities for graduates, and a generation of “engaged” professionals, are all helping the growth of an indigenous psychology. Increasing participation of Latin American psychologists in international congresses, particularly those of the Interamerican Society of Psychology, has had laudatory effects on the development of the discipline in the region.     

Delay-discounting probabilistic rewards: Rates decrease as amounts increase

The independence of delay-discounting rate and monetary reward size was tested by offering subjects (N = 621) a series of choices between immediate rewards and larger, delayed rewards. In contrast to previous studies, in which hypothetical rewards have typically been employed, subjects in the present study were entered into a lottery in which they had a chance of actually receiving one of their choices. The delayed rewards were grouped into small ($30–$35), medium ($55–$65), and large amounts ($70–$85). Using a novel parameter estimation procedure, we estimated discounting rates for all three reward sizes for each subject on the basis of his/her pattern of choices. The data indicated that the discounting rate is a decreasing function of the size of the delayed reward (p < .0001), whether hyperbolic or exponential discounting functions are assumed. In addition, a reliable gender difference was found (p = .005), with males discounting at higher rates than females, on average.     

Metaphorical analysis and hermeneutical interpretation in analytical group psychotherapy

The principle of hermeneutical interpretation (i.e., the art and discipline of analyzing the symbols of sacred texts) is explained and applied to the analytical group situation. It is maintained that the approach employed by this methodology provides a viable manner for understanding patients' unconscious communications. In particular, the relationship between metaphorical communication and the hereand now therapeutic experience is discussed. It is argued that the unconscious manifests itself as a set of metaphorical expressions. The paper presents two clinical vignettes illustrating how this hermeneutical methodology can aid the therapist to read the unconscious meanings of such metaphors.     

Task determinants of ear differences in melody processing

In Experiment 1 nonmusicians were presented with dichotic melodies, which differed either on all pitches or by a single note, followed by a set of four binaural melodies. They were asked to recognize among the alternatives only one member of the dichotic pair in the “single-focus” task, and both dichotic melodies in the “double-focus” task. These different attention requirements led to a LEA in the first task which contrasted with the REA observed in the other task when melodies differed by all pitches. A possible confounding (fusion of the common pitches) prevents comparison of the tasks for melodies differing by a single pitch. The role of the extent of melody differences was further investigated in a second experiment by changing melodies on one, two, or three notes. No effect of material was observed on ear asymmetries. Task demands appeared as the most critical determinant of ear differences and are discussed in terms of their particular influence on the adoption of an analytic or holistic processing mode. Male subjects were found to be more responsive than females to analytic processing suggestions.     

Listening to speech while retaining music: What happens to the right-ear advantage?

On each trial, subjects were played a dichotic pair of syllables differing in the consonant (/ba/, /da/, /ga/) or in the vowel (/ba/, /b?/, /bi/). The pair of syllables was preceded by a melody, or a sentence, and followed by the same or a different melody, or sentence. Subjects either had to retain the first piece of additional material or were free to ignore it. The different combinations of phonemic contrast, additional material, and instruction concerning the additional material were used in different sessions. In each case, the main task of the subjects was to respond to the presence or the absence of the target /ba/ on the ear previously indicated. There was no effect of context on relative ear accuracy, but the right-ear advantage observed for consonants in response latency when subjects retained a sentence gave way to a small nonsignificant left-ear advantage when subjects retained a melody. Right-ear advantage in response latencies was also observed for vowels in the verbal context, but the contextual effect, although in the same direction as for consonants, was very slight. The implications of contextual effects for a theory of the determinants of the auditory laterality effects are discussed.