The impact of task difficulty expectations on intrinsic motivation

Two studies investigated expectations of task difficulty induced prior to task involvement and their impact upon an individual's subsequent intrinsic interest. Expectations of task difficulty were manipulated through easy/hard instructions by the experimenters. Interest, but not performance, varied as function of expected task difficulty, with “easy” eliciting greater interest than “hard” instructions. The generality of this finding was supported by its demonstration in studies utilizing different experimenters (male, female), subject populations (children, college), and tasks (perceptual-motor, cognitive).     

Family therapy and incomplete families

Much of the literature in family therapy refers to the clinically orientated work with well-motivated families using specific techniques. This article briefly outlines the two main theoretical stances within family therapy as a whole, and describes three categories of incompleteness in families with particular reference to the idea of 'masked' incompleteness. This is illustrated by five case examples which show some of the common difficulties of working with families whose disturbance includes a masked incompleteness. The inadequacies of a singular treatment approach with such families are outlined, and it is suggested that the 'systems' approach in particular has limitations and possible contra-indications in such circumstances. It is argued that the more eclectic and pragmatic approach described, whilst remaining within the boundaries of family therapy as a whole, is likely to offer a more effective consideration of the long term needs of such families.     

TRANSFER OF STIMULUS CONTROL FROM MOTOR TO VERBAL STIMULI1

A transfer of stimulus control procedure was used to teach three profoundly retarded adolescents a series of specific responses to specific verbal instructions. After imitative control of a behavior was established, a verbal instruction was presented immediately before the behavior was modelled. Each correct response was followed on the next trial by inserting a delay between the verbal instruction and the modelling of the behavior. The delays increased from trial to trial. Transfer of stimulus control was indicated when a subject responded correctly on five consecutive trials before the behavior was modelled. All three subjects responded correctly to each verbal instruction after that item was trained in a multiple-baseline order. Generalization did not occur to items that had not been trained. Probe data revealed that some variations of the verbal instructions controlled responses after training was completed.     

A remote keyboard switch for the IBM PC/AT and compatibles

A relatively simple, remote keyboard switch for the IBM PC/AT and compatibles is discussed. It may be used to isolate a subject from an experimenter when the experimenter is controlling an experiment with the PC. The device, based on a 4066 CMOS, when used in conjunction with a monochrome monitor and a color monitor, enables the experimenter to switch, manually or programmatically (TTL), between the local monitor and the local keyboard and a remote monitor and a remote keyboard for presentation of stimuli and for recording of subject’s responses.     

Apparent reversals of a rotating mask: A new demonstration of cognition in perception

A mask of a face rotated about its vertical axis of symmetry can appear to oscillate rather than rotate. Do stimulus features (e.g., shape) or cognitive factors (e.g., differential familiarity with convex and concave views of faces) explain this new illusion? In Experiment 1, differential familiarity was varied across stimuli by using familiar and unfamiliar objects rotating at 4 rpm and within stimuli by showing the objects upright and inverted. True motion was seen more with unfamiliar objects than with familiar objects and more with an inverted mask than with an upright mask. The results of Experiment 2, which was done with static views, suggest that the upright and inverted masks present similar structure to the visual system. In Experiment 3, the objects were shown rotating at 8 rpm; the results are similar to those of Experiment 1. These experiments favor a differential familiarity account of this illusory motion. Cognitive constraints on perceived motion and perceived rigidity are discussed.     

Polite responses to polite requests

Indirect requests vary in politeness; for example, Can you tell me where Jordan Hall is? is more polite than Shouldn't you tell me where Jordan Hall is? By one theory, the more the literal meaning of a request implies personal benefits for the listener, within reason, the more polite is the request. This prediction was confirmed in Experiment 1. Responses to indirect requests also vary in politeness. For Can you tell me where Jordan Hall is?, the response Yes, I can — it's up the street is more polite than It's up the street. By an extension of that theory, the more attentive the responder is to all of the requester's meaning, the more polite is the response. This prediction was confirmed in Experiments 2, 3 and 4. From this evidence, we argued that people ordinarily compute both the literal and the indirect meanings of indirect requests. They must if they are to recognize when the speaker is and isn't being polite, and if they are to respond politely, impolitely, or even neutrally.     

The “Three Rs” of Sex

Summary We have seen that sex has three functions, the reproductive, the relational, and the recreational. We have shown it probable that a great deal of unnecessary marital conflict comes from one party holding relational sex to be all-important while the other considers recreational sex to be of more importance. Finally, we have indicated that it is most likely that if they can compromise this difficulty by each meeting the other on his own ground a part of the time, much of the haggling will stop and many unnecessary divorces will be avoided.The Rev. Maxwell H. Morris, Th.D., following studies in the Old Testament and ancient history in the University of Oregon, the University of Washington, and the University of Southern California, spent a year in Jewish studies at the Hebrew Union College for Rabbinical Studies in Cincinnati. His interest in the psychology of sex grew out of his attempts to understand phallic and fertility cults.     

Taste familiarity and apomorphine-induced taste aversions in humans

Human volunteers learned taste aversions to a relatively novel cranberry flavor paired with apomorphine-induced illness. These aversions were significantly reduced by pretreatment familiarization to the flavor unless an unpalatable interfering flavor was introduced just prior to the administration of apomorphine. The outcomes have implications for taste-aversion learning in humans and for the control of flavor preferences in patients undergoing illness-inducing chemotherapy.