Creativity: Hot and cold

Cognitive theorists have frequently distinguished between two types of thinking, one associated with control and reason, and the other with emotional expression A similar distinction was made by Freud between secondary and primary process thinking This paper has investigated whether corresponding styles of creativity can be discovered A study was reported in which two types of behaviour appeared a permissive, expressive type, and a controlled, coping type Both of these correlated positively with self-reported creativity A second study contrasted the correlates of originality on tests of divergent thinking with originality on projective tests. Two clusters emerged, one representing competent, stable, resourceful personalities who scored high on divergent thinking tests of originality, the other representing impulsive, emotionally expressive, imaginative persons who scored high on projective test originality It was concluded that there are two creativity styles corresponding to the two types of cognitive process, and these styles were labelled “cold” creativity and “hot” creativity. Both styles play a part, in varying proportions, in any creativity process Performance on the divergent thinking tests of originality is more closely related to cold than hot creativity and, therefore, the distinction does not correspond with that between convergent and divergent thinking Nor does it correspond with differences between scientific and artistic interests and creativity.     

Reactions to Receiving Aid as a Function of Cost to Donor and Opportunity to Aid1

Drawing on equity theory, two possibilities that might reduce resentment of the donor following the receipt of aid which cannot be repaid were investigated: (a) the cost to the donor is minimized, and (b) the recipient has an opportunity to aid a third party. The results provide evidence that the recipient will like the donor less and be less willing to request future aid when he cannot repay the aid than when he can. Weak support was received by the hypothesis that the tendency to like the donor less when the aid cannot be repaid will be stronger, the greater the perceived cost. Support was found for the hypothesis that the decreased willingness to request future aid when the aid cannot be repaid will be stronger, the greater the perceived cost. Support was found for the hypotheses that the recipient will like the donor more and be more willing to request future aid when he has an opportunity to aid a third party than when he cannot aid anyone.     

Immediate memory for faces: Long- or short-term memory?

Immediate recognition memory span and short-term forgetting for non-verbal stimuli (“unfamiliar faces”) were investigated in normal subjects and amnesic patients. Surnames were used as a verbal control. It was found that normal subjects had a reliable immediate recognition span of one for faces and that there was no decrement in performance in the retention of three faces over a 30-s interval. Amnesic subjects were impaired on both the immediate memory span task and on the short-term forgetting task. This pattern of results contrasts with those obtained using surnames on which the results were comparable to other verbal S.T.M. tasks. It is suggested that performance on these tasks of recognition memory for faces is determined by L.T.M. processes. The implications for the interpretation of S.T.M. are discussed.     

An alternative to grapheme-phoneme conversion rules?

When orthographic factors were tightly controlled in a lexical decision task, it was observed that orthographic similarity rather than homophony with a word led to increased reaction times to nonwords. This result suggested that the pseudohomophone effect is not a phonological effect. Instead, a conversion of the graphemes of a stimulus item into different graphemes via a set of grapheme-grapheme conversion rules was supported. When phonological factors were tightly controlled and orthographic similarity varied, evidence for the existence of grapheme-grapheme rules was provided in both a lexical decision task and a task in which subjects were required to say whether an item was pronounced in the same way as a word. Even in the latter task, in which the likelihood of phonological recoding was optimized, it appeared that grapheme-phoneme rules were rarely, if ever, used.     

Mechanisms underlying writing and speech in aphasia

As a parallel to the dual decoding concept for processing of written language we proposed that phonological encoding does not necessarily occur in writing and that the phonemic and graphemic subsystems can be independent on the one-word level. This hypothesis was tested by comparing oral and written performance in a picture-naming task in Broca's and Wernicke's aphasics. In addition, the residual tacit knowledge of the orthographic properties of the names of the pictures was examined with a multiple-choice recognition task. The principal finding is that Broca's aphasics who were better in written than in oral naming showed more graphemically and semantically motivated errors than aphasics who were better in oral than in written naming, the latter producing more phonemically motivated errors. This result supports the dual encoding concept for writing on the singleword level, implying a direct route from the mental lexicon to the graphemic system in parallel with a route mediated by the phonemic system. Multiple-choice recognition was found to be superior to both oral and written performance in both Broca's and Wernicke's aphasics.     

Ambiguous musical figures and auditory streaming

Three experiments with musicians and nonmusicians (N=338) explored variations of Deutsch’s musical scale illusion. Conditions under which the illusion occurs were elucidated and data obtained which supported Bregman’s suggestion that auditory streaming results from a competition among alternative perceptual organizations. In nExperiment 1, a series of studies showed that it is more difficult to induce the scale illusion than might be expected if it is accepted that an illusion will be present for most observers despite minor changes in stimuli and experimental conditions, The stimulus sequence seems better described as an ambiguous figure. Having discovered conditions under which the scale illusion could be reliably induced, Experiments 2 and 3 manipulated additional properties of the stimulus (timbre, loudness, and tune) to provide cues to streaming other than pitch and location. The data showed that streaming of this sequence can be altered by these properties, supporting the notion of a general parsing mechanism which follows general gestalt principles and allows streaming by many stimulus dimensions. Finally, suggestions are made as to how this mechanism might operate.     

Seniority in the generational transition of laboratory groups: The effects of social familiarity and task experience

The determinants of leadership seniority in laboratory groups were investigated in two experiments. In both experiments a procedure was used in which individual group members were periodically replaced throughout 7 generations. The individuals within the groups folded origami products and traded with other groups so as to earn quarters. In the first experiment the effect of social familiarity on seniority was investigated by comparing a set of standard groups with a set of rotational groups in which the group members moved from group to group between generations and thus always interacted with strangers. There was less seniority in the rotational groups. In the second experiment the effect of experience on seniority was investigated by comparing a set of standard groups with a set of experienced groups in which the new group members were recruited from the standard groups. There was less seniority in the experienced groups. It was found in both experiments, in agreement with previous research, that over generations the subjects earned increasing amounts of money and worked with increasing speed and efficiency.     

The Importance of Context in the US Preexposure Effect in CTA: Novel versus Latently Inhibited Contextual Stimuli

Three experiments were conducted to examine the role of novel contextual stimuli in producing the unconditioned stimulus (US) preexposure effect. Experiment 1 demonstrated that novel contextual stimuli produce a significantly stronger US preexposure effect than familiar or “latently inhibited” contextual stimuli. Moreover, subjects preexposed in the presence of latently inhibited contextual cues failed to show a significant US preexposure effect. Experiments 2 and 3 attempted to provide evidence that the addition of a single novel stimulus to the latently inhibited context would result in a significantly stronger US preexposure effect than when no such novel cue was present. Experiment 3 was able to demonstrate this effect. Results are consistent with the Rescorla–Wagner (1972) model of conditioning.