Implicit memory: Effects of network size and interconnectivity on cued recall.

Previous findings have indicated that the recall of a recently studied word is affected by how many associates it has in long-term memory (set size). The purpose of these experiments was to determine whether recall is also affected by the connectivity of these associates. Studied words were preselected to represent combinations of set size and connectivity and, in different experiments, recall was cued with extralist or intralist cues and with cues sharing few or many associates with the studied words. Effects of study time, encoding context, and levels of processing were also investigated. The results indicated that recall was more likely for words with smaller associative sets and for words with more interconnected sets of associates. These findings demonstrate that the recall of a recently presented word in the presence of a retrieval cue is affected by both the size and organization of its implicitly activated associative structure. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

Aging and the stability of activation and sampling in cued recall.

Age effects in cued recall were investigated as a function of activation and sampling of preexisting associates of the test cue. Young adults, community-dwelling elderly, and elderly patients studied lists of unrelated words and were tested with extralist cues. Preexperimental strength between test cues and studied words was manipulated to discern differences in activation, and normative size of the set of associates was manipulated to discern differences in sampling. Test delay and prior testing were also manipulated in Exp 1. Although large age effects were found with phonemic and taxonomic test cues, young and older Ss showed comparable effects of strength and set size, suggesting that age effects were not due to activation and sampling differences. Test delay and prior testing also had comparable effects. Implications for age effects in episodic cued recall are discussed. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

Recall of associates generated to emotionally toned stimulus words.

Suggests that an explanation for differential recall can be found without recourse to an arousal model. Four experiments were conducted with 200 college students. Exp 1 replicated the findings of E. B. Jones et al (1987) that Ss show poor recall of associates to emotional words. Exp 2 showed that reducing the number of emotionally toned stimulus words in the word list resulted in an improvement in recall for associates generated to these words. In Exp 3, recall for associates generated to emotionally toned stimulus words was poorer if the stimulus words were similar in meaning than if they were dissimilar. Exp 4 found that stimulus word properties other than emotionality could be manipulated to demonstrate a differential recall. Results are explained in terms of the inability of the retrieval system to discriminate among competing sets of responses that are semantically and emotionally congruent. (French abstract) (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

Cue familiarity but not target retrievability enhances feeling-of-knowing judgments.

Two hypotheses concerning people's ability to predict later memory performance for unrecalled items were investigated. The target retrievability hypothesis states that feeling-of-knowing judgments (FKJs) are based on partial target information, and the cue familiarity hypothesis asserts that they are based on recognition of the cues. In Exps 1 and 2, Ss either generated or read the targets of paired associates. Half of the cues had been primed in a pleasantness-rating task. The generation manipulation increased recall but had no effect on FKJs. Cue priming had no effect on recall but increased FKJs. In Exp 3, using general information questions primed after the initial recall attempt, both cue and target priming increased FKJs. Exp 4, which remedied difficulties in Exp 3, showed no effect of target priming, whereas cue priming increased FKJs. The results favor the cue familiarity hypothesis. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

Comparing word fragment completion and cued recall with letter cues.

Cued recall with word stems as cues and fragment completion rely on different types of letter cues and also differ in the explicit–implicit nature of the retrieval orientation. Despite these differences, variables effective in one task may be effective in the other because both rely on letter cues. Two variables known to affect cued recall were manipulated: Lexical set size (number of words that fit the letter cue) and meaning set size (number of associates generated to the studied words). Across four experiments, subjects in each task were less likely to recover targets from larger lexical sets. However, meaning set size affected cued recall but not fragment completion. These results indicate that fragment completion and letter-cued recall are based on lexical search but that cued recall also involves a semantic search component. Furthermore, type of retrieval cue had a greater effect than type of retrieval orientation. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

The self as a mnemonic device: The role of internal cues.

Two studies with 48 undergraduates examined the contention that the self-reference effect occurs because the self provides a set of organized internal cues in the form of personal experiences that can mediate recall. The 2 properties—constructibility and associability of internal cues—are also important to the self-reference effect. S-generated cues composed of personal experiences representing the internal self were compared with cues composed of names of body parts representing the external self (Exp I). The body-part cues were more easily reconstructed by Ss at recall than were personal-experience cues. Nevertheless, trait words were better recalled after being related to personal experiences, because trait words and personal experiences were easily associated. In Exp II, concrete nouns were presented rather than trait words, and no difference in recall using the 2 types of cues was found. This occurred because concrete nouns can be easily associated with either personal experiences or body parts. (30 ref) (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

Encoding context and retrieval conditions as determinants of the effects of natural category size.

Studying a familiar word activates its associates in long-term memory. In the present experiments we manipulated the number of associates activated by words studied in the presence of unrelated context words, meaningfully related context words, or in the absence of modifying context words. Memory was tested by either cued or free recall. The results showed that the number of directly activated associates can facilitate, have no effect, or disrupt recall for studied words. The direction and magnitude of the effects of number of activated associates is shown to be determined by the encoding/retrieval context. Implications for the distinction between episodic and semantic memory are discussed. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

Creating false memories: Remembering words not presented in lists.

Two experiments (modeled after J. Deese's 1959 study) revealed remarkable levels of false recall and false recognition in a list learning paradigm. In Exp 1, Ss studied lists of 12 words (e.g., bed, rest, awake); each list was composed of associates of 1 nonpresented word (e.g., sleep). On immediate free recall tests, the nonpresented associates were recalled 40% of the time and were later recognized with high confidence. In Exp 2, a false recall rate of 55% was obtained with an expanded set of lists, and on a later recognition test, Ss produced false alarms to these items at a rate comparable to the hit rate. The act of recall enhanced later remembering of both studied and nonstudied material. The results reveal a powerful illusion of memory: People remember events that never happened. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

Exact and conceptual repetition dissociate conceptual memory tests: Problems for transfer appropriate processing theory.

Tested whether a conceptual implicit memory test exhibited repetition effects similar to those found in free recall. 555 Ss participated in 3 experiments. In Exp 1, Ss rated a series of target words and their associates according to their degree of pleasantness in the implicit word-fragment completion and cued recall, and category cued and free recall tests. In Exp 2, Air Force recruits were tested on the category instance generation (CIG) and 4 additional tests in Exp 1. Exp 3 tested the Ss for CIG or category cued recall using instructions for relational process. Both CIG and category cued recall exhibited conceptual repetition effects. Category cued recall showed important differences between CIG and free recall. Theoretical implications are discussed. (French abstract) (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

Age effects in cued recall: Sources from implicit and explicit memory.

In 2 experiments, young and old adults were compared on cued recall using direct and indirect test instructions. Participants studied words under an incidental orienting task of rating each word for concreteness. Test cues were meaningfully related to the targets, and participants used them either to recall the studied word (direct test) or to generate a related word (indirect test). Target words and test cues varied in the number of associates linked to them prior to the laboratory experience, and effects of the size of the sets of associates were used as indicators of implicit memory search. Age differences were observed in the effects of target and cue set size as well as in the effects of type of test instruction. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

Retrieval specificity and the attenuation of forgetting by testing.

Examined the effect of a single test trial on the rate of forgetting of word lists. 288 undergraduates studied a list of words and were given a recall test with weak associates as cues after either 10 min, 48 hrs, or 1 wk. Immediately after studying the list, Ss were tested with the same weak associates, different weak associates, or strong associates, or were dismissed without being tested. When the same cues were used on the 2 tests, recall performance did not deteriorate over time, but tests with different cues, whether strong or weak, had little effect on the rate of forgetting. Results suggest that a test can provide highly specific retrieval operations that compensate for the deterioration of the trace over time. (French abstract) (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

Hypermnesia for pictures and words: Testing the recall level hypothesis.

Five experiments with 150 undergraduates examined the hypothesis that hypermnesia (improved recall across repeated tests) can be predicted from cumulative recall levels. Contrary to this view, Exp I demonstrated that when the cumulative recall levels for pictures and words were equated, pictures still produced a larger hypermnesic effect. Results of Exps II and III show that varying test length (and thus recall level) had no effect on the magnitude of the hypermnesic effect. In Exp IV, Ss studied a categorized word list and then received 1 21-min test or 3 7-min tests. Results suggest that (a) similar retrieval processes are used in these 2 conditions and (b) hypermnesia in the repeated test paradigm results from Ss generating covert cues to aid item recovery across tests. Overall findings suggest that although hypermnesia is related to cumulative recall levels, various other factors (e.g., item type) modulate the magnitude of the hypermnesia by affecting item accessibility across tests. It is argued that changes in item accessibility across tests, caused by learning during testing, play a major role in producing hypermnesia in both episodic and semantic memory tasks. (43 ref) (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

Optimizing cue effectiveness: Recall of 500 and 600 incidentally learned words.

Examined prerequisites on optimal memory performance of large amounts of verbal materials in 3 cued-recall experiments with 28 undergraduates. In Exp I, Ss defined their own retrieval cues by generating 1 or 3 properties of features for each of 504 words. Results indicate that the level of recall was directly related to the amount of retrieval information provided. Results of Exp II show that self-generated cues were much more effective than those generated by someone else. In both experiments, performance decreased over 1-, 2-, and 7-day retention intervals. Findings of Exp III, with 600 words to be remembered, replicated those of Exps I and III. Distinctiveness and compatibility of retrieval cues are proposed as 2 necessary prerequisites to perfect recall performance. (26 ref) (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

Suffix interference in the recall of linguistically coherent speech.

In Exp 1, definitions of low-frequency words were presented for on-line written recall. Each definition was followed by a nonword speech suffix presented in the same voice as the definition, the same nonword presented in a different voice, or a tone. There was a significant reduction in the recall of the terminal words of the definitions in the speech suffix conditions compared with the tone control. This pattern was replicated in Exp 2, in which Ss did not begin their recall until the suffix item or tone was presented, although the magnitude of the suffix effect was reduced in this experiment. In Exp 3, the suffix effect was considerably reduced compared with the suffix effect found with the definitions presented in Exps 1 and 2. This pattern was replicated in Exp 4, in which Ss did not begin their recall of the story sentences until the speech suffix or tone was presented. Results suggest that auditory memory interference can take place for linguistically coherent speech, although the magnitude of the interference decreases as one increases the level of linguistic structure in the to-be-recalled materials. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

Category-order effects in memory span.

When Ss are required to recall lists containing both words and digits, memory span is higher when the digits precede the words than when the words precede the digits. In Exp 1, both forward and backward recall were tested; it was demonstrated that this category-order effect reflects the input position, and not the output position, of the items. Exp 2 revealed that this effect was not eliminated by a filled retention interval. Exp 3 showed that the effect was eliminated when lists were presented at a fast presentation rate. In Exp 4, the effect was eliminated when Ss engaged in articulatory suppression. A 5th experiment extended the findings of Exp 4 to the case in which lists are composed of semantically related or unrelated words. These results suggest that category-order effects reflect mnemonic activity that Ss engage in during list presentation and do not arise from structural characteristics of the memory system. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

The next-in-line effect: Encoding or retrieval deficit?

The phenomenon that people cannot remember what happens when they are next-in-line to perform was investigated in 2 experiments with 144 undergraduates to determine whether this memory deficit reflects a failure to encode or an inability to retrieve preperformance events. In Exp I, 96 Ss participated in 4 memory trials; in each trial, half the Ss were called on to read words, and the other half merely listened. Before each trial, Ss were told whether they would be readers or listeners and the order in which numbers would be called. Thus, readers could anticipate precisely when they would be called on to perform. After hearing the 28 words in random order, all Ss wrote down the recalled words on cued or noncued sheets. Although the semantic cues strongly facilitated access to memories, they did not moderate the next-in-line effect. In Exp II, Ss were told—either before or after performing—to make a special effort to remember preperformance events. If instructed afterward, Ss displayed the usual memory deficit. If instructed beforehand, they reversed the deficit and showed a superior preperformance recall. It is concluded that the next-in-line effect is a failure at encoding, not at retrieval. (27 ref) (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

Developmental differences in organization and recall: Training in the use of organizational techniques.

Used an alternating sort-recall procedure in 3 experiments to train 204 elementary school children in the use of organizational techniques as memory aids. All Ss sorted a group of words into 2–7 categories, and some Ss were required to learn the sorting patterns generated by adults. In Exp I, the semantic sophistication of a S's sorting style predicted recall performance. Further, the tendency to improve memory performance as a result of being constrained to adult sorting patterns varied with age; constrained 5th graders significantly improved their recall, whereas the recall of 3rd and 7th grade Ss was not affected by this training. However, more detailed organizational training in Exp II facilitated the recall of 3rd graders. In Exp II, it was found that the constraining procedure was not necessary for facilitation to be observed. Rather, instructions to group words on the basis of meaning were sufficient to produce improved recall. Further, improvements in sorting style accompanied all significant changes in recall. Findings are discussed in terms of a discrepancy between the information which a child has in permanent memory and that which he uses spontaneously in the context of a memorization task. The importance of input organization as a mediating factor in memory performance and development is suggested. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

Topic structure representation and text recall.

Tested the hypothesis that readers represent a text's topics and their interrelations as they read and then use those representations to access information about each topic. In 2 experiments, 222 undergraduates were required to read and free recall an expository text of approximately 1,100 words in length. Exp I manipulated both the order of topics in the stimulus text and whether the introductory paragraph stated the topics and their organization. It was found that Ss recalled information about fewer topics if the topics were randomly ordered and the introductory paragraph was uninformative than if topics were logically ordered or if the introductory paragraph was informative. Differences in recall of topics accounted for much of the variance in overall recall and recall errors. Exp II examined the effects of the presence or absence of topic sentences and of variations in the physical marking of paragraph boundaries. Findings show that Ss recalled information about more topics if the text contained topic sentences than if it did not. Results are consistent with the hypothesis that readers use a representation of a text's topic structure to guide recall. (40 ref) (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

Encoding and retrieval operations in relation to age.

In 2 experiments, the memory performance of a total of 40 young (mean age 18 yrs) and 40 elderly (mean age 75 yrs) Ss was compared in a procedure that allowed testing of the target words twice, first for recognition and then for cued recall. Conventional analyses of the recall and recognition data gave results that echoed previous findings that (a) significant age differences were found in recall but not in recognition, and (b) the recall differences were minimized when the target items were recalled in the context of cues highly related to the target items. In accordance with contemporary theoretical conceptions of memory, a feasible interpretation of these results is that memory loss is due to a retrieval deficit. However, further analyses showed that both young and older Ss failed to recognize many words that they subsequently recalled, suggesting that some caution is necessary in interpreting overall recall and recognition memory performance. Possible differences in encoding and retrieval processes as a function of age are discussed. (18 ref) (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

Role of out-group cues in determining social identity.

Examined the role of out-group cues in determining social identity and guiding behavior in 2 experiments with 131 undergraduates. In Exp I, Ss were exposed to a cue either of an in-group (Ss' college), a relevant out-group (a rival college), or an irrelevant out-group (a baseball team). Ss examined a list of words and were later asked to recognize those they had seen from a larger list in which words related to the 3 groups were embedded. Results indicate that Ss made more false recognitions of in-group related words when a relevant out-group was salient than when an irrelevant out-group was salient. Exp II tested a behavioral implication of Exp I: Out-group salience increases adherence to an in-group norm. In the 1st phase of Exp II, Ss were divided into 2 groups and deliberated 2 civil suits. Ss' in-group favored the plaintiffs for both cases. Ss were divided into new groups for the 2nd phase, and the same procedure was followed. This time, however, the in-group favored the defendants. In the 3rd phase, Ss were exposed to a cue either of the out-group in Phase 1 or Phase 2. Ss' judgments for 2 new cases were biased in the direction of the norm of the in-group that was associated with the salient out-group. Ss favored the plaintiff (or defendant) when the 1st (or 2nd) out-group was salient. (14 ref) (PsycINFO Database Record (c) 2010 APA, all rights reserved)