Semantic memory: Searching for attributes vs searching for names

The purpose of this experiment was to determine whether searching for a word that has a particular attribute (a fruit that is yellow) involves a different process than searching for a word whose name has a particular form (a fruit whose name begins with "p"). Ss saw category nouns paired with adjectives or letter restrictors presented on a series of blocked trials and a series of mixed trials. The Ss had to produce a word that fell in the space defined by the noun and the restricting adjective or letter. RT was fastest when trials were blocked and when a letter followed the presentation of the noun. This finding suggested the existence of two retrieval plans that can be executed when S has knowledge of the forthcoming type of item.     

Eyewitness performance in different psychological types

A study of 112 subjects examined the performance on a complex memory task by various Jungian psychological types. Although differences did not emerge in terms of overall accuracy, they did emerge in terms of susceptibility to postevent information. Introverts and intuitives, alone and in combination, were found to be more prone to accept both misleading and consistent postevent information, rendering them more likely to be inaccurate in the first case and more likely to be accurate in the second case. A variety of explanations are considered.     

Johannes Kepler’s computer simulation of the universe: Some remarks about theory in psychology

Computer simulation may be an overly seductive way of formulating theory in the social sciences. The capability of constructing complex computer simulation models may remove some of the incentive for finding simple laws. This point is illustrated via a fantasy in which the sixteenth century astronomical theorist, Johannes Kepler, uses Ms computer instead of his mind to account for extant data on stellar and planetary motion. Similarities between sixteenth century cosmology and twentieth century psychology are discussed.     

‘Unconscious transference’ can be an instance of ‘change blindness’

Three experiments investigated the role of ‘change blindness’ in mistaken eyewitness identifications of innocent bystanders to a simulated crime. Two innocent people appeared briefly in a filmed scene in a supermarket. The ‘continuous innocent’ (CI) walked down the liquor aisle and passed behind a stack of boxes, whereupon the perpetrator emerged and stole a bottle of liquor, thereby resulting in an action sequence promoting the illusion of continuity between perpetrator and innocent. The ‘discontinuous innocent’ (DI) was shown immediately afterward in the produce aisle. Results revealed that: (1) more than half of participants failed to notice the change between the CI and the perpetrator, (2) among those who failed to notice the change, more misidentified the ‘CI’ than the ‘DI’, a pattern that did not hold for those who did notice the change. Participants were less likely to notice the change when they were distracted while watching the video. Copyright © 2007 John Wiley & Sons, Ltd.     

The revelation effect for autobiographical memory: A mixture-model analysis

Participants provided information about their childhood by rating their confidence about whether they had experienced various events (e.g., “broke a window playing ball”). On some trials, participants unscrambled a key word from the event phrase (e.g., wdinwo—window) or an unrelated word (e.g., gnutge—nugget) before seeing the event and giving their confidence ratings. The act of unscrambling led participants to increase their confidence that the event occurred in their childhood, but only when the confidence rating immediately followed the act of unscrambling. This increase in confidence mirrors the “revelation effect” observed in word recognition experiments. In the present article, we analyzed our data using a new signal detection mixture distribution model that does not require the researcher to know the veracity of memory judgments a priori. Our analysis reveals that unscrambling a key word or an unrelated word affects response bias and discriminability in autobiographical memory tests in ways that are very similar to those that have been previously found for word recognition tasks.     

Acquisition of information from rapidly presented verbal and nonverbal stimuli

Two experiments tested recognition memory for rapidly presented stimuli. In Experiment I 16 words were presented at exposure times ranging from 25 to 500 msec followed by a yes-no recognition test. The results showed a strong dependence of memory performance on both exposure time and serial position. In Experiment II 16 random forms were presented at exposure times ranging from 125 to 2000 msec followed by a yes-no recognition test. Results for random forms showed that memory performance was strongly dependent on exposure time but not on serial position. Taken together, the results of Experiments I and II suggest qualitative encoding differences between verbal vs nonverbal stimuli.     

Make-believe memories

Research on memory distortion has shown that postevent suggestion can contaminate what a person remembers. Moreover, suggestion can lead to false memories being injected outright into the minds of people. These findings have implications for police investigation, clinical practice, and other settings in which memory reports are solicited.     

MEMORIES OF CHILDHOOD SEXUAL ABUSE

Women involved in out-patient treatment for substance abuse were interviewed to examine their recollections of childhood sexual abuse. Overall, 54% of the 105 women reported a history of childhood sexual abuse. Of these, the majority (81 %) remembered all or part of the abuse their whole lives; 19% reported they forgot the abuse for a period of time, and later the memory returned. Women who remembered the abuse their whole lives reported a clearer memory, with a more detailed picture. They also reported greater intensity of feelings at the time the abuse happened. Women who remembered the abuse their whole lives did not differ from others in terms of the violence of the abuse or whether the violence was incestuous. These data bear on current discussions concerning the extent to which repression is a common way of coping with childhood sexual abuse trauma, and also bear on some widely held beliefs about the correlates of repression.