Biomedical subjects

Todd C Jones

Publications and source records attributed to Todd C Jones.

6 recordsLinked to original sources

PubMed2006

Conjunction errors, recollection-based rejections, and forgetting in a continuous recognition task.

Six experiments investigated conjunction memory errors (e.g., falsely remembering blackbird after studying parent words blackmail and jailbird) in a continuous recognition procedure with a parent-conjunction lag manipulation. In 4 experiments (1A, 1B, 2A, and 2B) "recollect" judgments, which indexed recall of parent words, showed that participants can use recollection to prevent conjunction errors. "Recollect" judgments, as well as overt recall of parent words (in Experiments 2A and 2B), dropped sharply from a lag of 0 to 1 word, then stabilized from a lag of 1 to 20 words. Thus, the "recollect" responses and overt recall demonstrate a step function of forgetting over short intervals. These data generalized to cued recall in Experiments 3A and 3B with the first morpheme (e.g., black) as the cue, though recall conjunction errors occurred infrequently relative to recognition conjunction errors. Overall, the results support the idea that automatic and controlled processes contribute to memory performance.

Attention↗

PubMed2006

Editing (out) generated study words in a recognition exclusion task: Effects of response signal delay and generation procedure.

Three experiments investigated participants' ability to exclude generated study words from "old" judgements on an exclusion task in which a response signal delay (RSD) was manipulated. In Experiment 1, words were generated by mentally conjoining components of two compound words, and a conjunction test condition was included (e.g., presentation of the lure checkpoint after studying checklist and needlepoint without generating the target). The exclusion error rate for generated words was higher than the conjunction error rate for a short RSD group but lower than the conjunction error rate for a long RSD group. The decrease in the familiarity effect across RSDs was extended to a conceptual cue generation procedure in Experiments 2 and 3, but an anagram generation procedure did not show similar evidence of recollection-based exclusions. The earliest indication of recollection-based editing of generated words occurred in a 2250-ms RSD (Experiment 3). An extension of a multi-factor transfer appropriate processing theory (deWinstanley, Bjork, & Bjork, 1996) of generation effects that incorporates influences of familiarity and recollection is advocated.

Attention↗

PubMed2005

Conjunction errors in recognition memory: modality-free errors for older adults but not for young adults.

A dual-process theory of memory was applied to processes in normal aging, with a focus on recognition errors in the feature-conjunction paradigm (i.e., false recognition of blackbird after studying parent words blackmail and/or jailbird). Study repetition was manipulated so that some parent words occurred once and others occurred three times. Age-related differences on hit scores occurred for two experiments. The results for feature and conjunction conditions showed repetition effects but no age-related differences when participants were uninformed of the lures (Experiment 1). However, age-related differences emerged when the retrieval of modality source information created a way to evade conjunction errors (Experiment 2). In the second experiment, study repetition decreased errors for the young adults but increased errors for the older adults, and young adults were better able than older adults to avoid conjunction errors when the parent words had been repeated. For older adults, the conjunction errors were modality-free. The results provide additional evidence that older adults experience difficulty in recollecting aspects of a study experience, and the results from groups of young adults required to respond quickly on the tests provide converging evidence for this conclusion.

Adult↗

PubMed2005

Study repetition and the rejection of conjunction lures.

Four experiments were conducted to provide further support for a dual-process approach to conjunction errors in recognition memory over a single-process approach. In Experiments 1, 2a, and 2b study words were repeated once (2 presentations) or several times (8 or 16 presentations), and a response signal delay (RSD) was manipulated (short vs long). Short RSD groups produced lower hit rates but higher conjunction error rates compared to long RSD groups. Repetition effects on conjunction errors occurred for short RSD but not long RSD groups. In Experiment 3, additional judgements on new items were solicited to show that the "null" effects for long RSD groups in the earlier experiments were, in fact, illusory. Together, the experiments provide evidence for recollection-based rejections of conjunction lures and support a dual-process theory of recognition memory over a single-process model.

Cognition↗

PubMed2004

Perceptual specificity of priming for compound words not presented.

Two experiments extended prior work on the perceptual specificity of priming to compound words not presented during a study phase. In both experiments, perceptual manipulations were employed, and priming was obtained on a word fragment completion test (e.g., c_ec_po_nt) where the lexical elements of the compounds (check and point) were presented in different study words. In Experiment 1, priming was highest when identical fragments for the lexical components were presented during the study phase (c_ec_list, needlepo_nt) and test phase (c_ec po_nt). In Experiment 2, visual study presentations, but not auditory study presentations, led to significant priming. The findings are consistent with predictions from transfer-appropriate processing and demonstrate perceptual, not lexical (post-perceptual), priming.

Humans↗

PubMed2002

Conjunction error rates on a continuous recognition memory test: little evidence for recollection.

Two experiments examined conjunction memory errors on a continuous recognition task where the lag between parent words (e.g., blackmail, jailbird) and later conjunction lures (blackbird) was manipulated. In Experiment 1, contrary to expectations, the conjunction error rate was highest at the shortest lag (1 word) and decreased as the lag increased. In Experiment 2 the conjunction error rate increased significantly from a 0- to a 1-word lag, then decreased slightly from a 1- to a 5-word lag. The results provide mixed support for simple familiarity and dual-process accounts of recognition. Paradoxically, searching for an item in memory does not appear to be a good encoding task.

Humans↗