Biomedical subjects

Mark L Howe

Publications and source records attributed to Mark L Howe.

9 recordsLinked to original sources

PubMed2006

Children's basic memory processes, stress, and maltreatment.

Building upon methods and research utilized with normative populations, we examine extant assumptions regarding the effects of child maltreatment on memory. The effects of stress on basic memory processes is examined, and potential neurobiological changes relevant to memory development are examined. The impact of maltreatment-related sequelae (including dissociation and depression) on basic memory processes as well as false memories and suggestibility are also outlined. Although there is a clear need for additional research, the investigations that do exist reveal that maltreated children's basic memory processes are not reliably different from that of other, nonmaltreated children.

Child↗

PubMed2006

Developmental invariance in distinctiveness effects in memory.

Improvements in 5- and 7-year-olds' acquisition and retention of related concept pairings were examined when additional similarities and differences between pair members were provided. Using a standard paired-associate learning paradigm, children learned 18 related picture pairs; some of the children either were given or produced additional similarities or differences between pair members at the time of learning. Three weeks after learning was complete, children attempted to recall the pairs. Using a model to determine the storage and retrieval loci of these effects, the results showed that (a) all children benefited from self-generated elaborations, regardless of whether these were similarities or differences, and these benefits were storage related, and (b) difference elaborations improved children's retention regardless of whether they were self- or experimenter-generated, and these effects were primarily retrieval based. These results are consistent with theories that (a) view retrieval as the locus of distinctiveness effects and (b) view storage as the locus of self-generated memory improvements.

Age Factors↗

PubMed2005

Children (but not adults) can inhibit false memories.

The role of inhibition in children's (5-, 7-, and 11-year-olds') false memory illusions in the Deese-Roediger-McDermott (DRM) paradigm was examined using a list-wise directed-forgetting procedure. Children studied either a single DRM list (control) or two DRM lists in succession with a directed-remembering instruction or a directed-forgetting instruction between list presentations. The findings indicated that, like adults, children effectively suppressed the output of true memories when given a directed-forgetting instruction. Unlike adults, whose false memories are not attenuated in directed-forgetting conditions, children suppressed false memories at recall in the directed-forgetting condition. Because recognition data indicated that the children did generate false memories regardless of instruction, it appears that although adults' false memories are generated automatically and do not become part of their conscious experience, children's false memories are produced with greater effort and conscious processing, and as a result are easier to suppress at output.

Adult↗

PubMed2004

The role of conceptual recoding in reducing children's retroactive interference.

Reductions in children's retroactive interference were examined with conceptual recoding. Children learned two 10-item lists of toys; items on the 2nd list could also be classified as vehicles. Some children were not told about this 2nd category, whereas others were told either at the end of acquisition or just prior to the retention test 24 hr later. The results showed that (a) children benefited from the recoding instruction, (b) younger but not older children failed to benefit from the recoding manipulation when it occurred just prior to the retention test, and (c) recoding reduced retroactive interference primarily through affecting storage processes. These results provide new evidence concerning the importance of making information distinctive in storage in children's retention.

Age Factors↗

PubMed2002

Age, memory load, and individual differences in working memory as determinants of class-inclusion reasoning.

We studied the effects of individual differences in speak-span scores and variations in memory demands on the class-inclusion performance of 10-, 13-, and 15-year-old children. The speak-span task was an age-appropriate modification of Daneman and Carpenter's (1980) reading-span task and was considered to be a measure of global resources. The age variable was assumed to be a global index of skill development, and some of the specific skills hypothesized to be important in class-inclusion reasoning were estimated using a mathematical model. The results from both regression analyses and the mathematical model indicated that differences in age, speak span, and memory load all affected performance. Surprisingly, the effects of speak span and memory load were independent. However, the effects of each of these variables depended on the age level of the participants. Based on these findings, we argued that (a) resources vary continuously with age, (b) both skill level and global resources should be varied in developmental studies of problem solving, and (c) resource theories (e.g., Norman & Shallice, 1986) should be modified to account for developmental change.

Adolescent↗

PubMed2002

The role of intentional forgetting in reducing children's retroactive interference.

Preschool and kindergarten children's retention of stories was examined in the presence of interfering information and instructions to forget. Children learned 2 stories and, 24 hr later, were asked to recall the 1st or 2nd story learned. Some of the children were instructed, either following acquisition or just prior to the retention test, to forget the 2nd, or interfering, story. A model was used to isolate storage and retrieval effects, and the results showed that (a) retroactive interference affected both storage- and retrieval-based forgetting rates for the younger children but only storage-based forgetting rates for the older children, (b) intentional forgetting reduced retroactive interference primarily by attenuating storage-based forgetting regardless of age, (c) intentional forgetting instructions were effective only at acquisition for preschoolers but at both acquisition and retention for kindergarteners, and (d) all children recalled the to-be-forgotten story as well as they recalled the to-be-remembered story. These results are interpreted in terms of reorganization and distinctiveness effects in storage.

Child↗

PubMed2002

From infant to child: the dynamics of cognitive change in the second year of life.

The authors review several key areas of early cognitive development in which an abrupt shift in ability at the end of the second year of life has been traditionally assumed. These areas include deferred imitation, self-recognition, language, and categorization. Contrary to much conventional theorizing, the evidence shows robust continuities in all domains of early cognitive development. Where there is evidence of a reorganization of behavior that makes a new level of performance possible, dynamic-systems analyses indicate that even these may be driven by underlying processes that are continuous. Although there remain significant definitional and methodological issues to be resolved, the outcome of this review augers well for newer models in which cognitive development is viewed as a continuous, dynamic process.

Child Development↗

PubMedDate not supplied

True and false memories in maltreated children.

Differences in basic memory processes between maltreated and nonmaltreated children were examined in an experiment in which middle-socioeconomic-status (SES; N = 60), low-SES maltreated (N = 48), and low-SES nonmaltreated (N = 51) children (ages 5-7, 8-9, and 10-12 years) studied 12 Deese-Roediger-McDermott lists. Using recall and recognition measures, the results showed that both true and false memories increased with age and, contrary to some speculation, these trends did not differ as a function of maltreatment status. However, there were differences in overall memory performance as a function of SES. These results are discussed in the broader framework of children's memory development and the effects of the chronic stress associated with child maltreatment on basic memory processes.

Child↗

PubMedDate not supplied

Developmentally invariant dissociations in children's true and false memories: not all relatedness is created equal.

The role of categorical versus associative relations in 5-, 7-, and 11-year-old children's true and false memories was examined using the Deese-Roediger-McDermott (DRM) paradigm and categorized lists of pictures or words with or without category labels as primes. For true items, recall increased with age and categorized lists were better recalled than DRM lists. For false items, recall increased with age except for picture lists, there were no differences between categorized and DRM lists and no effect of priming, and there were fewer false memories for pictures than words. Like adults, children's false memories are based on associative not thematic relations, whereas their veridical memories depend on both. This new, developmentally invariant dissociation is consistent with knowledge- and resource-based models of memory development.

Association Learning↗