The effects of cue modality on the quality of personal memories retrieved

We investigated the effect of cue modality on the specificity, speed, vividness, and age of autobiographical memory retrieval. Cues were presented as either an odour, a visual image, or a word label. Odour-cued memories were older, more likely to be categoric, and were slower to be retrieved. Few gender differences were found although females reported more vivid memories than males. We suggest that cue modality directly affects retrieval processes; odour cues are more likely to initiate a perceptual search strategy, in contrast to memories cued by visual images and words, which are usually conceptually/verbally mediated.     

The unpredictable past: spontaneous autobiographical memories outnumber autobiographical memories retrieved strategically

Involuntary autobiographical memories are spontaneously arising memories of personal events, whereas voluntary memories are retrieved strategically. Voluntary remembering has been studied in numerous experiments while involuntary remembering has been largely ignored. It is generally assumed that voluntary recall is the standard way of remembering, whereas involuntary recall is the exception. However, little is known about the actual frequency of these two types of remembering in daily life. Here, 48 Danish undergraduates recorded their involuntary versus voluntary autobiographical memories during a day using a mechanical counter. Involuntary memories were reported three times as frequently as voluntary memories. Compared to voluntary memories, they were associated less with problem solving and social sharing and more with day dreaming, periods of boredom, no reasons for remembering and predominantly came to mind during unfocused attention. The findings suggest that involuntary recall is a typical way of accessing the personal past.     

On the prevalence of directly retrieved autobiographical memories

In this study, we used process measures to understand how people recall autobiographical memories in response to different word cues. In Experiment 1, participants provided verbal protocols when cued by object and emotion words. Participants also reported whether memories had come directly to mind. The self-reports and independent ratings of the verbal protocols indicated that directly recalled memories are much faster and more frequent than generated memories and are more prevalent when cued by objects than emotions. Experiment 2 replicated these results without protocols to eliminate any demand characteristics or output interference associated with the protocol method. In Experiment 3, we obtained converging results using a different method for assessing retrieval strategies by asking participants to assess the amount of information required to retrieve memories. The greater proportion of fast direct retrievals when memories are cued by objects accounts for reaction time differences between object and emotion cues, and not the commonly accepted explanation based on ease of retrieval. We argue for a dual-strategies approach that disputes generation as the canonical form of autobiographical memory retrieval and discuss the implication of these findings for the representation of personal events in autobiographical memory. (PsycINFO Database Record (c) 2012 APA, all rights reserved).     

The influence of reporting mode on children's cued personal memories

The Autobiographical Memory Test (AMT) is widely used in research contexts to measure the extent to which participants (children or adults) report specific or general memories in response to cue words. Recalling fewer specific and more general memories (overgeneral memory) has been shown to be linked to depression in adults, but findings for youth, in particular, are mixed. Different versions of the AMT may be one contributing factor, yet this issue has received little research attention. The current study investigated the influence of reporting mode (written vs. spoken) on the specificity, length, and content of memories provided by 8- to 10-year-old children (N?=?48). No significant differences were found in the number of specific responses given in the written and spoken modes. On the other hand, the spoken mode elicited longer and more detailed memories, although most content differences were eliminated when memory length was controlled. These findings suggest that different reporting modes can influence the nature of the memories reported, but the absolute differences are relatively small.     

The quality of suggested memories

Alarge number of studies have demonstrated that participants could be led to report suggested events that were never witnessed (Loftus & Palmer, 1974 ). The present study attempts to explore the quality of such suggested memories. Thirty‐six participants were exposed to a live event of brief duration (20 s). They were then misled about certain aspects of the event. Memory was assessed using a forced‐choice recognition test. The participants were also required to give remember/know/guess responses, together with confidence ratings, and also to indicate how they came to remember the item. Thirty‐six per cent of the suggested memories were “know” responses, while 43% were “remember” responses. Moreover, whenever the participants had a remember experience they always recalled a wealth of visual information. With regards to the confidence level of the suggested memories, it was observed that the suggested memories were as confidently held as accurate memories. The results indicate that suggestions may become integrated with other kinds of information and that these falsely remembered memories are often accompanied with varied kinds of information; predominant among them seems to be visual imagery and past associations. For accurate memories, too, visual imagery was recalled the most, followed by other kinds of information (e.g., past associations, emotional, auditory, and inferential). The study points to the difficulties of differentiating between true recollections of actual events and false recollections of events that did not occur.     

Affect and retrieval of personal memories

The relationship of pleasantness and intensity of affect to retrieval of reallife experiences was investigated in three experiments. Subjects reported the first specific personal experience that came to mind for a series of prompt words. Latency of report was regarded as a measure of memory accessibility. The first study compared retrieval time for prompts that sampled affects varying in pleasantness and intensity. Experiments II and III assessed the possible contributions of demand characteristics and implicit inferential processes to retrospective judgments of feelings. Judgments of the intensity of feeling engendered when the events occurred were inversely related to report latency. Results support the conclusion that intensity ratings were reliable indices of memory information rather than inferences or reconstructions mediated by report latency. Other characteristics of recollections such as pleasantness, recency, or relative frequency of the specific affects were not correlated with report latency. Two explanations of the findings are considered: an arousal hypothesis and an extent-of-processing hypothesis. The latter provides the most adequate account and relates the present findings to a more general theory of memory processes. The results are also relevant to investigations of mood-dependent retrieval.This is an expanded version of a paper presented in the Symposium on Naturally Occurring Memories, at the meeting of the American Psychological Association, Toronto, August 1978.     

Point of view in personal memories

A structural aspect of personal memories was examined in four studies. In some memories, one has the perspective of an observer, seeing oneself “from the outside.” In other memories, one sees the scene from one's own perspective; the field of view in such memories corresponds to that of the original situation. The existence of “observer” and “field” memories was confirmed in Study 1, using a recall questionnaire. In Study 2, the similarity structure of a specified set of eight to-be-recalled situations was established: the significant dimensions were “emotionality” and “self-awareness.” Study 3 related these dimensions to the observer-field distinction; situations involving a high degree of emotion and selfawareness were most likely to be recalled with an observer perspective. Recall set was varied in Study 4: a focus on feelings (as opposed to objective circumstances) produced relatively more field memories. Studies 3 and 4 also showed that events reported as more recent tend to be recalled in the field mode. Thus a qualitative characteristic of personal memories—the perspective from which they are experienced—is apparently related to characteristics of the original event, to the individual's purpose in recalling that event, and to the reported recall interval.     

The effects of cue distinctiveness on odor-based context-dependent memory

The distinctiveness of an ambient odor was examined in relation to its success as a cue in contextdependent memory. Distinctiveness was examined in terms of both cue novelty and contextual appropriateness. Two experiments were conducted in which three different ambient odors that varied in familiarity and contextual appropriateness were manipulated at an incidental word learning encoding session and at a free recall retrieval session 48 h later. Experiment 1 revealed that when a novel ambient odor (osmanthus) was the available context cue, word recall was better than in any other condition. Further, among familiar odor cues, recall was better with a contextually inappropriate odor (peppermint) than with a contextually appropriate odor (clean fresh pine). Experiment 2 confirmed that superior word recall with osmanthus and peppermint depended on the odor cue’s being available at both encoding and retrieval, and that the relation of an odor to the situational context is a key factor for predicting its effectiveness as a retrieval cue.     

The effects of social pressure on false memories

The present experiments were designed to examine the effects of social pressure on false memories. Participants studied lists created to elicit false memories and then worked in conjunction with virtual confederates on a recognition memory task. In Experiment 1, participants worked with one or two confederates to complete multiple study-test trials. On the group tests, participants were implicitly pressured to recognize words that did not appear on the studied lists. Experiment 2 was implemented similarly, but utilized a presumably more difficult recognition test involving one long study phase followed by one long test phase. After the purported group tests in both experiments, participants completed surprise individual recognition tests. In both experiments, social pressure influenced participants' responses on group recognition tests and subsequent individual recognition tests. Furthermore, the results indicated that social pressure affected both veridical memories and false memories.     

Using cue words to investigate the distribution of autobiographical memories in childhood

The cue-word technique is frequently used with adults to examine the distribution of autobiographical memories across the life span. Such studies demonstrate childhood amnesia: a paucity of memories of events from the first 3(1/2) years of life, and a gradually increasing number of memories from age 3 to age 7. The pattern is remarkable in light of findings of autobiographical competence among children in the period of life eventually obscured by this amnesia. In the present study, we modified the cue-word task for use with school-age children. Seven- to 10-year-olds successfully generated and dated memories of past events. Girls provided more complete narratives than boys. Across the sample, the resulting distribution of memories was better fit by an exponential than by a power function, implying that early memories may not consolidate and instead remain vulnerable to interference. Implications for explanations of childhood amnesia are discussed.     

The role of the amygdala in emotional experience during retrieval of personal memories

ABSTRACT

Although the role of the amygdala in emotional memory retrieval has long been established, how such engagement varies depending on valence and retrieval context is less clearly understood. Participants retrieved personal memories associated with primarily positive, primarily negative, and mixed-valence images, pressing a button when successful. The button press divided trials into search and elaboration phases. Participants provided positivity and negativity ratings immediately following each trial, and then again in a post-retrieval survey. The relation between amygdala recruitment and emotionality exhibited a four-way interaction, with no other significant main effects or interactions. The interaction was driven by a temporal shift in the role of amygdala recruitment during retrieval of memories associated with mixed-valence images: Negativity ratings were supported more by search-related activity whereas positivity was more strongly associated with elaboration. Amygdala activity during retrieval relates to emotional experience in more complicated ways than previously understood. When participants were able to consider positive and negative aspects of the same event, amygdala recruitment during search and elaboration were associated with opposite behavioural effects. Such findings suggest that the amygdala may support distinct aspects of emotional experience for the same memory depending on when during retrieval it is recruited.     

The effects of cue reliability on infants' manual search.

Nine-month-old babies were presented a manual search problem in which toys were hidden in one of two containers, and then the containers were transposed. Over a series of training trials either two, one, or no cues were perfectly correlated with the location of the toy. The infants' first searches became more accurate over training trials in conditions with consistent container and/or position cues. In the final training trial block search performance was best with two cues, intermediate with one cue, and least accurate in the no-cue condition. In a subsequent reversal procedure, in which the toy was placed in the previously unused hiding place, the number of correct first searches also differed according to the nature of cues available across hidings. The implications for learning the concept of object permanence are discussed.     

Internal languages of retrieval: The bilingual encoding of memories for the personal past

In contrast to most research on bilingual memory that focuses on how words in either lexicon are mapped onto memory for objects and concepts, we focus on memory for events in the personal past. Using a word-cue technique in sessions devoted exclusively to one language, we found that older Hispanic immigrants who had come to the United States as adults internally retrieved autobiographical memories in Spanish for events in the country of origin and in English for events in the U.S. These participants were consistently capable of discerning whether a memory had come to them "in words" or not, reflecting the distinction between purely imagistic or conceptual memories and specifically linguistic memories. Via examination of other phenomenological features of these memories (sense of re-living, sensory detail, emotionality, and rehearsal), we conclude that the linguistic/nonlinguistic distinction is fundamental and independent of these other characteristics. Bilinguals encode and retrieve certain autobiographical memories in one or the other language according to the context of encoding, and these linguistic characteristics are stable properties of those memories over time.     

The phenomenology and temporal distributions of autobiographical memories elicited with emotional and neutral cue words

In this study we examined whether the temporal distribution of autobiographical memory changes when different types of cue words are used to elicit the memories, and how the type of cue word affects the phenomenal characteristics of the memories. A total of 76 participants, ranging in age from 21 to 69 years, were presented with 22 cue words (emotional, emotion-provoking, and neutral). They were asked to recall a personal event and to complete the Autobiographical Memory Questionnaire (Rubin, Schrauf, & Greenberg, 2003, 2004) for each cue word. Results showed that the phenomenological properties of autobiographical memories which were cued with emotional and emotion-provoking words were rated higher than those of memories which were cued with neutral words, and that the peak in the temporal distributions of the autobiographical memories that were cued with emotional or emotion-provoking words were located later than the peak of the distribution of the memories that were cued with neutral words.     

The Effect of modality specific interference on working memory in recalling aversive auditory and visual memories*

Both auditory and visual emotional memories can be made less emotional by loading working memory (WM) during memory recall. Taxing WM during recall can be modality specific (giving an auditory [visuospatial] load during recall of an auditory [visual] memory) or cross modal (an auditory load during visual recall or vice versa). We tested whether modality specific loading taxes WM to a larger extent than cross modal loading. Ninety-six participants undertook a visual and auditory baseline Random Interval Repetition task (i.e. responding as fast as possible to a visual or auditory stimulus by pressing a button). Then, participants recalled a distressing visual and auditory memory, while performing the same visual and auditory Random Interval Repetition task. Increased reaction times (compared to baseline) were indicative of WM loading. Using Bayesian statistics, we compared five models in terms of general and modality specific taxation. There was support for the model describing the effect on WM of dual tasking in general, irrespective of modality specificity, and for the model describing the effect of modality specific loading. Both models combined gained the most support. The results suggest a general effect of dual tasking on taxing WM and a superimposed effect of taxing in matched modality.     

The effects of cue distinctiveness on infants' manual search

Nine- and sixteen-month-old infants were repeatedly presented a manual search problem in which a toy was hidden in one of two containers, which were then moved into reach. The distinctiveness of the containers or their closeness during the movement was varied in different conditions. Overall, the older infants performed better than younger infants, performance improved across trials, and there were more correct searches when the containers or trajectories were distinctive. Analyses of visual orienting indicated that infants learned to restrict their looking to the hiding place. The ability to maintain attention to discriminative cues may be instrumental to progress in delayed-reaction and object permanence tasks.     

The effects of emotional content and aging on false memories

After studying a list of words related to a nonpresented lure word, people often falsely recall or recognize the nonpresented lure. Older adults are particularly susceptible to these forms of false memories. The age-related false memory enhancement likely occurs because older adults do not encode, or later retrieve, items in enough detail to allow them to discriminate between presented words and other associated but nonpresented items. Pesta, Murphy, and Sanders (2001) suggested that the emotional salience of the lures may provide distinctiveness, so that individuals would be less likely to endorse an emotional lure as a studied item than to endorse a neutral lure. In the present investigation, young and older adults were less likely to falsely recall or recognize emotional, as compared with neutral, lures. Both age groups appeared capable of using the distinctiveness of the emotional lures to reduce, although not to eliminate, false recall and recognition.     

The effects of affect and input source on flashbulb memories

Flashbulb memories of shocking news (Challenger Explosion, death of Princess Diana, Pearl Harbour and Iraq bombings) were employed to test two hypotheses: encoding emotion enhances memory and how one gets the shocking news will help determine the nature of what is recalled. Different groups of subjects (Total = 2405) remembered their discoveries at delays ranging from 2 weeks to 50 years on three memory measures: a free and probed recall test of their flashbulb discovery, and a probed recall of the facts concerning the events themselves. Subjects were grouped according to the source of their discovery (Media vs. Person), affect at encoding (calm vs. upset) and recounts (few vs. many). The results indicated that how one learns of shocking news determined the type and extent of the resultant memory. ‘Media’ subjects remembered more facts whereas ‘person’ subjects recalled more of their personal discoveries regardless of the initial flashbulb inspiring event. Copyright © 2007 John Wiley & Sons, Ltd.