Effect of contextual organization on spatial memory of middle-aged and older women.

Examined the memory performance of 20 women aged 31–59 yrs and 20 aged 65–85. Ss reconstructed spatial arrays, replacing miniature objects in either a contextually organized panorama or a noncontextually organized bank of cubicles. Performance of the middle-aged Ss did not differ between the 2 tasks. Older Ss performed as well as middle-aged Ss in the panorama task, but in the cubicles task their scores were lower than in the panorama task and lower than those of the younger Ss in the cubicles task. Results support the conclusion that in a task that allows the use of existing contextual organization as a memory aid, age differences in memory performance disappear. Age differences may be limited to tasks that remove previously learned relationships between items (as in recall of lists of unrelated words), requiring Ss to invent an organizational structure to facilitate recall. Though such tasks predominate in research, they probably do not represent the memory problems met in everyday life, especially by older adults. (30 ref) (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

Some training factors related to procedural performance.

Used 4 experimental tasks to test the effects on procedural performance of providing special instructions on logical-tree construction and use and of limiting vs not limiting the time available for studying the task instructions. Ss were 20 male undergraduates. Results indicate that performance accuracy was statistically better when either one or both logical-tree instruction and practice was provided and the task instruction study time was limited, than when Ss were permitted to study the task instruction for as long as they chose and in whatever way they chose. It is concluded that quite simple procedures for familiarizing Ss with logical-tree operations can improve performance on procedural tasks. It also appears that placing a limit on the time available for study of instructions can be better than permitting unlimited time. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

Use of causal attributions about recall performance to assess metamemory and predict strategic memory behavior in young children.

27 1st graders and 24 2nd graders were exposed to a memory task in which their recall performance varied as a function of their incidentally elicited sorting behavior. When asked what had affected their recall, only some Ss at each grade identified sorting as a causal factor, although all had used sorting. Attributions about sorting could not be accounted for by differential memory for sorting behavior or by differential use of sorting on previous trials. Causal attributions, but neither previous sorting nor nonattributional verbal reports about sorting behavior, predicted use of a sorting strategy in a standard, study-recall task 1 wk later. Ss who had attributed recall to sorting tended not to use rehearsal strategies on the subsequent task, suggesting that causal attributions reflected their views about what were the most important influences on recall. Ss' ability to assess their recall performance and their insight into possible mechanisms by which sorting affects recall are discussed as avenues for future research into how children acquire their ideas about factors that affect memory. (30 ref) (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

Complex decision rules in categorization: Contrasting novice and experienced performance.

The ability of novice and experienced Ss to learn complex decision rules was tested with 3 categorization tasks. Each task involved 2 categories with exemplars that were normally distributed on 2 stimulus dimensions. Three separate sets of stimuli were used, and in each task the decision rule that maximized categorization accuracy was a highly nonlinear function of the stimulus dimension values. In the 3 tasks, all experienced Ss used highly nonlinear decision rules. Quadratic rules were supported over bilinear rules, and in many cases Ss used nearly optimal decision rules. These findings did not depend on whether the stimulus components were integral or separable. Novice Ss also did not use simple linear rules. A model that assumed Ss tried a succession of different linear rules was also rejected. Instead, novices appeared to use quadratic rules, although less consistently than experienced Ss. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

Influence of socioeconomic status on children's classification and free recall.

29 kindergarten and 29 1st-grade children were divided into 3 SES levels based on their parents' education level (college, high school, or less than high school) and given 2 sort/recall tasks on sets of pictures that could be organized on the basis of familiar taxonomic or complementary relations. On 1 task, Ss sorted pictures into identical groupings on 2 consecutive trials prior to recall; on the other task, Ss sorted the pictures only once. It was found that Ss from college-educated families were more apt to sort items on the basis of taxonomic relations than Ss from high-school-educated and less-than-high-school-educated families. However, there were no significant differences in levels of recall or clustering. Results indicate that young children from low-SES homes will demonstrate high levels of memory performance when tasks are constructed so that they are familiar with the relations among the to-be-remembered items. The appropriateness of distinguishing children's cognition in terms of A. R. Jensen's (see record 1969-09740-001) Level I vs Level II dichotomy is discussed in light of recent research examining the role of knowledge base on children's memory functioning. (45 ref) (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

Short-term longitudinal change in cognitive performance in later life.

Changes in mean performance on memory, information processing, and intellectual ability tasks over a 3-yr period were examined. The sample consisted of 328 community-dwelling men and women (from an original sample of 484 individuals) aged 55–86 yrs. Ss completed tasks yielding measures of verbal processing time, working memory, implicit memory, vocabulary, verbal fluency, world knowledge, reading comprehension, word recall, and text recall. The results showed significant average decline on working memory, verbal fluency, and world knowledge. There were also interactions for 2 processing time measures and working memory, showing greater decline in the earlier-born cohort group than in the later-born cohort group. A step-down analysis revealed that covarying declines in other variables, including processing time, did not eliminate significant declines in working memory, verbal fluency, and world knowledge. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

Semantic activation and episodic memory: Age similarities and differences.

In 2 experiments, 48 19–35 yr olds and 48 59–75 yr olds were engaged in semantic and nonsemantic orienting tasks and were subsequently given incidental or expected recall and recognition tasks. Reaction time (RT) patterns from the orienting tasks suggested that all Ss experienced similar semantic activation during encoding. Under incidental conditions, age differences in memory performance were minimal. When memory tests were expected, younger Ss recalled and recognized more items than did older Ss, suggesting that younger Ss were more effective in their deployment of mnemonic strategies. The age difference was particularly pronounced for unattended items, which suggests an age difference in the capacity to encode all of the episodic information. (31 ref) (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

Dividing attention between the hands and the head: Performance trade-offs between rapid finger tapping and verbal memory.

Tested a multiple resources approach to time-sharing performance which assumes that each cerebral hemisphere controls its own set of processing resources that it cannot share with the other hemisphere. Right-handed men performed a verbal memory task while concurrently tapping the index finger of either hand as rapidly as possible. Task priority was manipulated with a payoff scheme. Ss remembered more on the verbal task when concurrently tapping with their left hands than when tapping with their right hands, and their memory performance was much better when the memory task was emphasized than when the tapping task was emphasized, regardless of hand. For the tapping task, decrements from baseline tapping rates and trade-offs between tasks were equal for both hands when Ss were reading the to-be-remembered words aloud. In contrast, during the retention interval, decrements were larger for the right hand than the left, and there were no task trade-offs. On right-hand trials, both tasks required exclusively left-hemisphere resources, whereas on left-hand trials, right-hemisphere resources were required to execute the tapping movements per se, but left-hemisphere resources were necessary to coordinate those movements with the movements required for overt speech. The data underscore the importance of manipulating task priority to obtain an accurate picture of a task's resource requirements. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

Individual differences in cognitive processes.

Studied the effects of verbal ability and sex on performance in a simultaneous matching task. The 537 undergraduates who participated were administered the verbal battery of the Lorge-Thorndike Intelligence Test. Ss with high-verbal ability (high verbals) were much faster than Ss with low-verbal ability (low verbals) in making taxonomic category identity matches and homophone identity matches. Results suggest that verbal ability is related to the speed of retrieval from long-term memory. In addition, high verbals were faster in making physical identity word matches, suggesting that either lexicographically coded information stored in long-term memory is used in such a task or that verbal ability is also related to the speed of retrieval from short-term memory. As expected, males did not differ from females in the time they required to perform any of the matching tasks, although males made slightly more errors. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

The relationship between visual memory function and lesions detected by magnetic resonance imaging after closed head injury.

45 patients (aged 16–73 yrs) with closed head injuries were followed up 6 mo postinjury with magnetic resonance imaging (MRI) and neuropsychological assessments. Ss were tested on visual and verbal measures of short-term memory and learning: pattern span, pattern learning, path span, path learning, digit span, and digit learning. Visual memory for patterns and paths was tested using a recall procedure. Compared with 22 controls (aged 15–70 yrs), Ss were significantly impaired on pattern span. Ss were also significantly impaired on measures of path learning and digit learning. Performance on the visual memory tasks was related to a rating of ventricular enlargement derived from MRI. It appears that diffuse damage remains of importance in predicting neuropsychological impairment in head injury. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

Effects of task and experimenter feedback on the self-reinforcement behavior of internals and externals.

Tested 24 internal and 24 external locus of control Ss on 3 verbal recognition memory tasks. Ss administered self-reinforcement for correct responses on the 1st and 3rd tasks, which had the same difficulty level. The 2nd task was either more or less difficult than the other 2 and was accompanied by E reinforcement. All Ss thus received external evaluation that had variable relevance to their self-evaluation. There were no differences in self-reinforcement base rate (reinforcement rate on the 1st task), but there were several significant and contrasting changes on the 3rd task. Internals attended to both task differences and external evaluation. Externals responded only to evaluation, apparently not attending to task factors. Results are discussed in terms of locus of control and in terms of self-reinforcement behavior. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

Impact of peripheral glucoregulation on memory.

Impaired glucoregulation is associated with neuropsychological deficits, particularly for tests that measure verbal declarative memory performance in older diabetic patients. The performances of 74 undergraduate students (mean age = 21 years) on several verbal declarative measures, including immediate and delayed paragraph recall, verbal free recall, and order reconstruction tasks, were correlated with glucoregulatory indices. The indices were obtained from glucose and insulin levels after a 75-g glucose load. In general, higher blood glucose levels were associated with poorer performance on all memory tests. Glucose ingestion did not interact with performance except on the most difficult task. Subjects with poorer glucoregulation showed higher evoked glucose and insulin, suggestive of a mild glucose intolerance accompanied by mild insulin insensitivity. Results suggest that poor peripheral glucoregulation has an impact on central nervous system functions. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

Memory for emotional words following unilateral temporal lobectomy

We recently reported that patients who had received unilateral temporal lobectomy, including the amygdala and hippocampus, show impaired acquisition in a fear conditioning task (LaBar, LeDoux, Spencer, & Phelps, 1995), indicating a deficit in emotional memory. In the present paper, we examined performance of these patients on two verbal, emotional memory tasks in an effort to determine the extent of this deficit. In Experiment 1, subjects were asked to recall emotional and non-emotional words. In Experiment 2, subjects were asked to recall neutral words which were embedded in emotional and non-emotional sentence contexts. Both temporal lobectomy subjects and normal controls showed enhanced recall for emotional words (Experiment 1) and enhanced recall for neutral words embedded in emotional sentence contexts (Experiment 2). These results suggest that the deficit seen in emotional memory following unilateral temporal lobectomy is not a global deficit and may be limited to specific circumstances where emotion influences memory performance. Several hypotheses concerning the discrepancy between the present studies and the fear conditioning results (LaBar et al., 1995) are discussed.     

Verbal and nonverbal memory processing in patients with obsessive-compulsive disorder: Its relationship to clinical variables.

Memory deficits have been reported in several neuropsychological studies of obsessive-compulsive disorder (OCD). Dysfunction in nonverbal memory has been consistently reported, whereas findings on verbal memory are more heterogeneous. The authors studied 50 patients with OCD who were matched for sex, age, educational level, and hand dominance with 50 healthy controls (HC). Cognitive performance in both groups was assessed on verbal and nonverbal memory tasks, and several clinical variables were also assessed in the patient group. Patients with OCD showed a pattern of cognitive dysfunction with alterations in areas of nonverbal memory (recall and recognition), and verbal memory (learning and recall). Older age at onset of OCD was associated with poorer performance on verbal memory tasks. Low scores on some verbal memory tasks were associated with severity of OCD, and nonverbal memory was influenced by depressive symptoms. The study suggests the existence of dysfunction in the execution of verbal and nonverbal memory tasks in OCD; the influence of clinical variables depends on the specific neuropsychological function. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

Verbal and visuospatial recall by younger and older subjects: Use of matched tasks.

In this study, 18 older (over age 65, M?=?75.61 years) and 18 younger (below age 40 and over age 17, M?=?26.44 years) healthy volunteers were tested on verbal and visuospatial recall. Tasks were matched on discriminating power. Older Ss performed worse than younger Ss on both tasks. The older Ss also showed a larger deficit in visuospatial than in verbal recall, relative to the younger Ss. These results are consistent with the theory of aging according to which verbal tasks are more resistant to deterioration than are nonverbal tasks. A psychological explanation based on lifetime experience with verbal material is preferred over the physiological explanation advocating faster aging of the right hemisphere. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

Development of strategies for recall and recognition.

40 kindergartners, 42 3rd graders, and 40 5th graders (CA's 5 yrs, 5 mo; 8 yrs, 3 mo; and 12 yrs, 4 mo, respectively) viewed 30 pictures of familiar objects, and then their free recall of the object names and their recognition of the original pictures were tested. The recognition test included pairing each picture with another similar picture of the same object. Half the Ss in each age group were prepared for recall with a strategy known to improve it in adults, and half were prepared for recognition with a strategy known to improve recognition in adults. Children encoded the stimuli differentially in accordance with the expected memory task and retrieved different stored information for each task. Both free recall and picture recognition memory improved with age. The recall strategy improved free recall performance at all ages, but the recognition strategy improved recognition performance only at the oldest age tested. (16 ref) (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

Adult age differences in recognition memory and frequency judgments for planned versus performed activities.

24 young (18.25–27.92 yrs old) and 24 elderly (62.75–80.42 yrs old) adults received a series of tasks (e.g., card sorting, arithmetic) that were planned for performance and subsequently performed with varying frequencies under intentional- and incidental-memory conditions to investigate age differences in active memory. Following the series of tasks, Ss estimated the frequencies with which task activities had been both performed and planned. Recognition-memory scores derived from performance-judgment scores revealed a significant age deficit in Ss' identification of those activities that had been performed earlier. However, memory was unaffected by intentionality at each age level. Results imply a modest age deficit for encoding rehearsal-independent, episodic events, but no age differences were found for reality monitoring: Elderly Ss were as proficient as young Ss in discriminating between planning and performance of an activity in terms of absolute frequency-judgment scores. (15 ref) (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

Visual imagery as a mnemonic aid for brain-injured persons.

Evaluated the efficacy of visual imagery as a mnemonic aid for brain-injured persons. Performance during acquisition and during recall after 30 min and after 1 wk were compared under imagery and nonimagery conditions in 19 brain-injured and 21 normal adults (mean ages 33.9–53.8 yrs) on 2 experimental tasks each consisting of 15 items: a paired-associate learning and a face/name task. Imagery Ss completed the WAIS Vocabulary scale and the Trail Making Test. All Ss completed the Sensory Perception and Aphasia Screening Tests. The results are as follows: (a) Normals performed better than the patients on all comparisons. (b) Visual imagery facilitated performance of both patients and normals on the paired-associate task and to a lesser extent on the face/name task during acquisition and for recall after 30 min but not after 1 wk. Implications for the usefulness of visual imagery as a mnemonic device and more general issues concerning the development of effective intervention techniques for patients with memory inefficiency are discussed. (25 ref) (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

A computer-generated measure of nursing workload for the emergency department based on discharge diagnosis

Following medial temporal damage, mature humans are impaired in retaining new information over long delays but not short delays. The question of whether a similar dissociation occurs in children was addressed by testing children (ages 7-16) with unilateral temporal lobe epilepsy (TLE) and controls on short- and long-term memory tasks, including a spatial delayed response task (SDR). Early-onset TLE did not affect performance on short delays on SDR, but it did impair performance at the longest delay (60 s), similar to adults with unilateral medial temporal damage. In addition, early-onset TLE affected performance on pattern recall, spatial span, and verbal span with rehearsal interference. No differences were found on story recall or on a response inhibition task.