Age differences in learning serial patterns: direct versus indirect measures

Adult age differences in learning and retention of a nonverbal sequence were examined using the serial reaction-time task of Nissen and Bullemer (1987), with 20 younger and 20 older Ss. An asterisk appeared in one of 4 spatial locations, and the Ss responded with a corresponding key press. The first 4 blocks each contained 10 repetitions of a 10- or 16-element spatial sequence, and the 5th block contained a random sequence. The difference between response time on Blocks 5 and 4 served as an indirect measure of pattern learning. The direct measure was accuracy in a final generation block in which the Ss predicted which location would appear next. Results were similar to those with verbal materials; the indirect measure revealed age similarity for patterns of both lengths, but the direct measure yielded age differences favoring the young. For both ages and types of measures, the long patterns led to poorer learning than did the short patterns.     

Adult age differences in the rate of learning serial patterns: evidence from direct and indirect tests.

Subjects performed a serial reaction time task (adopted from Nissen & Bullemer, 1987) that contained a repeating pattern of spatial locations. In Experiment 1, following 20 repetitions of a 10- or 16-element pattern, reaction time was equally disrupted for both younger and older people when the sequence became random. In Experiment 2, the response times for subjects encountering the 10-element pattern were compared with those of subjects encountering a random sequence. These response time functions diverged at the same point in training for the 2 age groups. Thus, on this indirect measure of response time facilitation, both experiments revealed age similarity in the rate of pattern learning. In contrast, on a subsequent direct test of pattern learning that required prediction, the younger people earned a higher percentage correct score than the older in both experiments. Age-related dissociations between direct and indirect measures of learning and comparisons with memory-impaired populations are discussed.     

Impaired skill learning in patients with severe closed-head injury as demonstrated by the serial reaction time (SRT) task

A group of 20 patients who sustained closed-head injury (CHI) and a matched control group of 20 individuals were tested on the serial reaction time (SRT) task. Three different sequence-learning measures were generated from the task: two implicit and one explicit. The two implicit sequence-learning measures include: (1) the learning rate on the first five blocks of the repeated sequence, assumed to reflect primarily general reaction time learning, and (2) the difference between the fifth block of the repeated sequence and the sixth block, a random sequence that reflects implicit sequence-specific learning. In addition, an explicit measure of sequence learning was generated. The results indicate that the CHI group was impaired on the explicit measure of sequence learning. The groups did not differ on general reaction time learning, one of the implicit measures of sequence learning. However, the control group was superior to the CHI group in learning the specific sequence repeated in the SRT task. This pattern of results is unique to the CHI group, corresponding with neither that of amnesic patients nor with that of patients with dysfunction of the basal ganglia (i.e., Parkinson's diseases).     

How implicit is visual statistical learning?

In visual statistical learning, participants learn the statistical regularities present in a sequence of visual shapes. A recent study (Kim, Seitz, Feenstra, & Shams, 2009) suggests that visual statistical learning occurs implicitly, as it is not accompanied by conscious awareness of these regularities. However, that interpretation of the data depends on 2 unwarranted assumptions concerning the nature and sensitivity of the tasks used to measure learning. In a replication of this study, we used a 4-choice completion task as a direct measure of learning, in addition to an indirect measure consisting of a rapid serial visual presentation task. Moreover, binary confidence judgments were recorded after each completion trial. This way, we measured systematically the extent to which sequence knowledge was available to consciousness. Supporting the notion that the role of unconscious knowledge was overestimated in Kim et al.'s study, our results reveal that participants' performance cannot be exclusively accounted for by implicit knowledge. (PsycINFO Database Record (c) 2012 APA, all rights reserved).     

内隐序列学习中的渐进意识：来自习得知识的发展与遗忘的证据

内隐学习过程中习得知识的发展变化是内隐学习的一个重要特征。本研究采用序列反应时范式通过操纵学习进程（实验一）和学习与测验间的时间间隔（实验二）来考察内隐序列学习进程中习得知识的发展与遗忘特征,结果发现,（1）内隐序列学习中习得的无意识知识多于意识知识;（2）随着学习的推进,意识知识逐渐增加,而无意识知识则呈减弱趋势,证实了内隐学习的长时功效;（3）习得的无意识知识具有抗遗忘性,而意识知识在间隔8小时之后才开始出现遗忘。     

Implicit learning of nonlocal musical rules: implicitly learning more than chunks

Dominant theories of implicit learning assume that implicit learning merely involves the learning of chunks of adjacent elements in a sequence. In the experiments presented here, participants implicitly learned a nonlocal rule, thus suggesting that implicit learning can go beyond the learning of chunks. Participants were exposed to a set of musical tunes that were all generated using a diatonic inversion. In the subsequent test phase, participants either classified test tunes as obeying a rule (direct test) or rated their liking for the tunes (indirect test). Both the direct and indirect tests were sensitive to knowledge of chunks. However, only the indirect test was sensitive to knowledge of the inversion rule. Furthermore, the indirect test was overall significantly more sensitive than the direct test, thus suggesting that knowledge of the inversion rule was below an objective threshold of awareness.     

Feature encoding and pattern classifications with sequentially presented Markov stimuli

The major objective of this experiment was to develop and evaluate a methodology designed to permit more direct assessment of the detailed processes involved in prototype abstraction. Thirty Ss participated in a task having the following characteristics: (1) classifications of Markov-generated stimuli sampled from two different populations, (2) controlled scanning of pattern features, (3) a measure of the degree to which pattern features were correctly identified, and (4) intermittent reproduction of pattern features abstracted from collections of mixed instances. Results showed that a significant number of the Ss learned to classify the stimuli into categories corresponding to generation rules and, at least partially, abstracted the population prototypes from these variable instances. The feature identification data suggested that the Ss who were unsuccessful in classifying the stimuli into the rule-defined categories used an inappropriate strategy for sampling pattern information upon which to base their classifications.     

Direct and indirect intergroup friendship effects: testing the moderating role of the affective-cognitive bases of prejudice

Direct friendship with outgroup members and the knowledge of ingroup-outgroup friendships (indirect friendship) can both reduce outgroup prejudice. Three correlational studies (Ns = 338, 141, and 798) tested the moderating role of the affective-cognitive bases of prejudice, assessing whether the size of the friendship- prejudice relationship depends on the extent to which emotions (vs. thoughts) are relevant to the prejudiced attitudes at stake. In Study 1, direct friendship effects were larger with outgroups generating stronger affective responding than with outgroups generating stronger cognitive responding, whereas indirect friendship effects were larger with cognitive than with affective outgroups. Study 2 detected a similar pattern but with prejudice basis assessed in terms of individual differences. Study 3 replicated Study 2's indirect friendship-cognitive basis moderation in a context of historically polarized intergroup relations and on two new outcome variables, intergroup trust and negative action tendencies.     

Free sorting with stimuli clustered in a multidlmensional attribute space

An experiment was conducted to determine whether Ss leam, without knowledge of results or prior familiarization with the prototypes, to sort histoform stimuli generated by three probablistic rules into categories consistent with these mies. Seven Ss were asked to sort 30 stimuli (10 from each schema population) on each trial. No constraints were placed on the number of categories to be used. A statistic was developed to measure consistency between schema-defined categories and subjeet-defined categories. Four of the seven Ss met the leaming criterion, and demonstrated increasing consistency with the schema-defined categories across trials. In general, more categories than necessary were used to classify the stimuli correctly. The results raise several questions about classification strategies used by Ss in perceptual learning tasks with stimuli generated by probabilistic rules, and indicate the need for further research conceming the variables that influence perceptual category formation.     

Relationship between neuropsychological data and response to behavioral treatment in a case of carbon monoxide toxicity and dementia

The ability of learning measures to predict a behavioral treatment response was of interest in this study. A severely impaired and behaviorally disturbed female neuropsychiatric patient was unable to demonstrate any learning on "direct" tests involving multiple free recall trials or cued paired associate recall. However, she performed normally on an "indirect" test involving implicit learning of new associations. To assess whether direct or indirect measures tapped the kind of learning required by a positive reinforcement-based treatment approach, a token program was carried out. There was a 72.5% reduction in maladaptive behavior relative to baseline, indicating a positive treatment response. The results are discussed in terms of the potential treatment utility and predictive validity of indirect measures of learning and memory and the relation of neuropsychological data to intervention issues in general.     

The effects of anchoring and practice n the learning of bidimensional vibrotactile signals

Two groups of Ss were required to make judgments of bidimensional vibrotactile signals over a period of five weeks (one session per week). Group A Ss were given 54 signals in four matrices (2 by 2, 3 by 3,4 by 4, and 5 by 5). Four anchors within the range were also given and were additionally judged among the 54 signals. The size of the A group decreased weekly from 30 to 6 Ss. Delayed knowledge of results (KOR) was given at the end of each session and the same random order of transmitting signals was used in each session. Group B Ss completed an extra (6 by 6) matrix and had one additional anchor, but they received no KOR and the random order of signal transmission was always varied. There was no significant difference between subgroups. Channel capacity was not obtained but the maximum information transmission was 3.08 bits. Practice generally increased T_(X;y) at each session.     

The role of scanpaths in the recognition of random shapes

Eye movements of 12 Ss were examined during learning and recognition of two-dimensional random shapes to determine the nature of the memorial representation of a stimulus and the utilization of this memorial representation in pattern recognition. Specifically, the purpose of this study was to test the scanpath model of pattern perception by determining whether scanpaths exist and, if so, how they influence recognition performance. Scanpaths, defined as overlapping fixation patterns in learning and recognition tasks, were observed in over half of all eye-movement records regardless of shape complexity. Presence of scanpaths did not increase recognition performance as measured by errors in recognition and Ss’ ability to reproduce the shapes. Although scanpaths did not influence recognition performance, their occurrence implicates them as a potential factor in the recognition process.     

Meaning from environmental sounds: types of signal-referent relations and their effect on recognizing auditory icons

This article addresses the learnability of auditory icons, that is, environmental sounds that refer either directly or indirectly to meaningful events. Direct relations use the sound made by the target event whereas indirect relations substitute a surrogate for the target. Across 3 experiments, different indirect relations (ecological, in which target and surrogate coexist in the world; metaphorical, in which target and surrogate have similar appearance or function, and random) were compared with one another and with direct relations on measures including associative strength ratings, amount of exposure required for learning, and response times for recognizing icons. Findings suggest that performance is best with direct relations, worst with random relations, and that ecological and metaphorical relations involve distinct types of association but do not differ in learnability.     

Detection measures in real-life criminal guilty knowledge tests.

The present study provides a first attempt to compare the validity of the respiration line length (RLL) and skin resistance response (SRR) amplitude in real-life criminal guilty knowledge tests (GKTs). GKT records of 40 innocent and 40 guilty Ss, for whom actual truth was established by confession, were assessed for their accuracy. When a predefined decision rule was used and inconclusive decisions were excluded, 97.4% of the innocent Ss and 53.3% of the guilty Ss were correctly classified with the SRR measure. For the RLL measure, the respective results were 97.2% and 53.1%. The combination of both measures improved detection of guilty Ss to 75.8% and decreased detection of innocent Ss to 94.1%. The combined measure seems to be a more useful means of identifying guilty suspects than each physiological measure alone. The results elaborate and extend those obtained in a previous field study conducted by Elaad (1990).     

中学生学习策略运用、学习效能感、学习坚持性与学业成就关系的研究

本研究随机选取初一、初二、高一、高二年级共442人为被试,采用协方差结构模型考察了中学生学习策略运用、学习效能感、学习坚持性与学业成就之间的关系。研究结果表明：(1)学习策略运用、学习效能感、学习坚持性与学业成就之间都存在显著的正相关;(2)学习策略运用、学习效能感直接影响学生的学业成就,学习坚持性则通过影响学生学习策略的运用间接影响学业成就,学习效能感与学习坚持性二者相互影响;(3)学习策略运用、学习效能感、学习坚持性对学业成就的影响效应依次为,学习效能感最大,学习策略运用其次,学习坚持性再次。     

Stimulus modality interacts with category structure in perceptual category learning

Two experiments were conducted that examined information integration and rule-based category learning, using stimuli that contained auditory and visual information. The results suggest that it is easier to perceptually integrate information within these sensory modalities than across modalities. Conversely, it is easier to perform a disjunctive rule-based task when information comes from different sensory modalities, rather than from the same modality. Quantitative model-based analyses suggested that the information integration deficit for across-modality stimulus dimensions was due to an increase in the use of hypothesis-testing strategies to solve the task and to an increase in random responding. The modeling also suggested that the across-modality advantage for disjunctive, rule-based category learning was due to a greater reliance on disjunctive hypothesis-testing strategies, as opposed to unidimensional hypothesis-testing strategies and random responding.     

Children's use of gaze and limb movement cues to infer deception

A sample of 96 children from kindergarten, 2nd, 4th, and 6th grades judged the truthfulness of peers who varied in gaze and limb movement while providing verbal communications. Results indicated that children attributed greater lying to the peers who displayed indirect rather than direct gaze and active rather than nonactive limb movement. The use of these cues was more evident in 4th- and 6th-grade children than it was in kindergarten and 2nd-grade children. Pilot studies indicated that adults and children as young as 5-6 years of age associated indirect gaze and active limb movement with anxiety. The findings are discussed with respect to children's theory of mind, concepts of lying, understanding of display rules, and learning of physiological cues associated with deception.     

Engaging Environments Enhance Motor Skill Learning in a Computer Gaming Task

Engagement during practice can motivate a learner to practice more, hence having indirect effects on learning through increased practice. However, it is not known whether engagement can also have a direct effect on learning when the amount of practice is held constant. To address this question, 40 participants played a video game that contained an embedded repeated sequence component, under either highly engaging conditions (the game group) or mechanically identical but less engaging conditions (the sterile group). The game environment facilitated retention over a 1-week interval. Specifically, the game group improved in both speed and accuracy for random and repeated trials, suggesting a general motor-related improvement, rather than a specific influence of engagement on implicit sequence learning. These data provide initial evidence that increased engagement during practice has a direct effect on generalized learning, improving retention and transfer of a complex motor skill.     

Direct versus Indirect Well-Being Measures: Using Partially Structured Stimuli to Evaluate Well-Being

Given the important limitations of direct (explicit) measures, the study of indirect (implicit) measures of psychological constructs has received increased attention of social researchers. However, in the field of well-being the measures that have traditionally been used have tried to capture people’s well-being in an explicit and direct way, with some exceptions that are based mainly on adaptations of the Implicit Association Test (IAT). Given the critics that the IAT has received, the first aim of the present research was to develop a new life satisfaction measure using partially structured stimuli (PSWBS). The second goal was to examine the relation between direct and indirect well-being measures. In the first study, PSWBS showed good internal consistency, test–retest reliability and construct validity. Factorial analyses indicated that this measure acted as an indirect measure. In addition, direct and indirect well-being showed a significant but weak relation. To explain this result, in a second study we analyzed the moderating role of social comparison orientation on the relation between direct and indirect well-being measures. As expected, more social comparison tendency implied a stronger relation. In a third study we analyzed the criterion validity of both kind of measures. The PSWBS, the Personal Wellbeing Index-Adults and the Satisfaction With Life Scale significantly correlated with a criterion validity coefficient in terms of a semi-structured interview made by an external experimenter. Finally, in a fourth experiment we analyzed the influence of social desirability on direct and indirect measures of well-being. In contexts of high desirability, partially structured stimuli seemed to be more resistant to response factors (e.g., control of impressions) than traditional direct measures.

     

Children's Use of Gaze and Limb Movement Cues to Infer Deception

A sample of 96 children from kindergarten, 2nd, 4th, and 6th grades judged the truthfulness of peers who varied in gaze and limb movement while providing verbal communications. Results indicated that children attributed greater lying to the peers who displayed indirect rather than direct gaze and active rather than nonactive limb movement. The use of these cues was more evident in 4th- and 6th-grade children than it was in kindergarten and 2nd-grade children. Pilot studies indicated that adults and children as young as 5-6 years of age associated indirect gaze and active limb movement with anxiety. The findings are discussed with respect to children's theory of mind, concepts of lying, understanding of display rules, and learning of physiological cues associated with deception.