Semantic-memory sources of episodic retrieval failure

In a cued-recall paradigm, retrieval blocking was investigated as a source of episodic retrieval failure. Each unrelated-interference (UR-I) word pair (e.g., “nurse-dollar”) had its own “competitive alternative” (e.g., “doctor’), which not only was strongly related to the cue word, but also possessed the same first two letters and final letter as did the target word. None of the unrelated-control (UR-C) word pairs (e.g., “clock-dollar”) had such an alternative. Cued recall substantially increased from the cue-word-only (e.g., “nurse- ”) to the three-letters-also cue condition (e.g., “nurse-do___r”) for the UR-C but not for the UR-I word pairs. Instead, subjects frequently reported the competitive alternatives in place of the UR-I target words in the three-letters-also cue condition. It was suggested that, relying on the primary plausibility judgment, subjects falsely accepted the competitive alternatives while the UR-I target words were blocked from retrieval by the potent retrieval of these plausible alternatives.     

Poverty,ethnicity, and risk of obesity among low birth weight infants

The independent and joint effects of family and neighborhood poverty and ethnicity upon weight trajectories from age two to six-and-a-half were examined using data from the Infant Health and Development Program (N = 985), an early intervention program for low birth weight children and families. At age two, family poverty was associated with higher body mass index (BMI), whereas neighborhood poverty and ethnicity were not. Over time, the BMI of toddlers from poor and near poor neighborhoods increased nonlinearly, while those from nonpoor neighborhoods remained stable. BMIs of Hispanic-American toddlers increased steadily over time, unlike African-American and Anglo-American toddlers. Although initially similar, over time African-American toddlers' BMIs increased more rapidly than Anglo-American toddlers. Family and neighborhood poverty and ethnicity were associated with BMI. More work is needed on how poverty and ethnicity contribute to differences in early weight gain in conjunction with sociocultural and environmental factors in the home and community.     

In-situ high-voltage electron microscopy observations of reactions between molten Zn and Fe

Reactions between molten Zn and Fe have been observed directly by means of an in-situ heating experiment in a high-voltage electron microscope. In order to suppress evaporation of Zn during the in-situ heating experiment the specimen was coated with a plasma-polymerized hydrocarbon film. Mechanisms for the formation of Fe-Zn intermetallic compounds are discussed and it is concluded that all the models proposed so far are of doubtful validity.     

Hypermnesia: A further examination of age differences between young and older adults

Previous studies that examined age differences in hypermnesia reported inconsistent results. The present experiment investigated whether the different study materials in these studies were responsible for the inconsistency. In particular, the present experiment examined whether the use of a video, as opposed to words and pictures, would eliminate previously reported age differences in hypermnesia. Fifteen college students and 15 older adults viewed a 3‐minute video clip followed by two free‐recall tests. The results indicated that older adults, as a whole, did not show hypermnesia. However, when older adults were divided into low and high memory groups based on test 1 performance, the high memory group showed hypermnesia whereas the low memory group did not show hypermnesia. The older adults in the low memory group were significantly older than the older adults in the high memory group – indicating that hypermnesia is inversely related to age in older adults. Reminiscence did not show an age‐related difference in either the low or high memory group whereas inter‐test forgetting did show an age difference in the low memory group. As expected, older adults showed greater inter‐test forgetting than young adults in the low memory group. Findings from the present experiment suggest that video produces a pattern of results that is similar to the patterns obtained when words and pictures are used as study material. Thus, it appears that the nature of study material is not the source of inconsistency across the previous studies.     

Psychoeducational Interventions with Pediatric Cancer Patients: Part I. Patient Information and Knowledge

We present a systematic review of published research on psychoeducational interventions for children with cancer. The current lack of an organizational model for this literature makes it difficult to form a coherent picture of the scattered literature and draw nomothetic conclusions. A model is described that is based on functional concepts from the literature on learning and instructional design. It is argued that it makes sense conceptually to analyze psychoeducational interventions in terms of psychoeducational principles, especially if the purpose is to illuminate the learning processes involved. Three categories of intervention are distinguished and the first of these, informational interventions to influence patient knowledge, is considered in this paper, and the other two categories will be reviewed in a subsequent paper. This review is organized by categories of information needs, intervention modes, and major types of independent variables. We concluded that the research supports few generalizable conclusions at this time, except that development of health-related knowledge in children is best accomplished by information transfer methods that are highly interactive and individualized. Interactive multimedia formats such as video games are seen as having the best potential, but further research is required.     

Subjective Happiness and Emotional Responsiveness to Food Stimuli

Through three studies, this study aims to investigate the relationship between subjective happiness and responsiveness to eating and to foods. In Study 1, 299 Japanese undergraduates completed the Japanese subjective happiness scale and self-report questionnaires for attitudes toward eating and food. Study 1 revealed that in daily life, people with higher happiness levels show a stronger tendency to feel pleasure by eating than those with lower happiness levels. In Study 2, 26 Japanese undergraduates performed impression assessments for foods when looking at pictures of them. In Study 3, 22 Japanese undergraduates performed the same assessments when looking at real foods and eating them using a comparison with the data from pictures of non-food items as a control condition. The results of the study indicate that people with higher happiness levels show a stronger emotional response (happy and glad) to food stimuli than those with lower happiness levels. Even images of food were effective. No such group differences were observed for appetitive responses. It was also shown that emotional responses to the pictures of non-food items’ condition in the two groups did not differ. The present studies provided empirical evidence that subjective happiness has relevance to daily eating behavior and attitudes. Further studies should investigate the possibility that subjective happiness is related to a wide range of behavior and cognition in our daily life.     

Effectiveness of Group Positive Parenting Program (Triple P) in Changing Child Behavior,Parenting Style,and Parental Adjustment: An Intervention Study in Japan

The purpose of this study is to investigate the effectiveness of a group-based family intervention program known as the Group Positive Parenting Program (Triple P), with families in Japan. Reductions in children’s behavioral problems, changes in dysfunctional parenting practices, and affects on parenting adjustment were examined. Participants of both the intervention and control groups (N = 91 and N = 24, respectively) were recruited from mothers visiting health clinics in Kawasaki City, Kanagawa. Intervention and control groups were assessed in terms of child behavior (Strength and Difficulty Questionnaire, SDQ), parenting style (Parenting Scale, PS), and parenting adjustment (Depression-Anxiety-Stress Scale, DASS; and Parenting Experience Survey, PES), both pre- and postintervention. A repeated measures multivariate analysis of variance was used to determine the intervention’s effects. The SDQ score for the conduct problems subscale indicated a significant intervention effect. In addition, the postintervention scores for all subscales of the PS, the DASS depression subscale and total scores, as well as ratings for perceived difficulty of parenting in the PES, were significantly reduced in the intervention group alone. The PES also revealed that confidence in parenting significantly increased only in the intervention group. Group Triple P is effective in decreasing child conduct problems, dysfunctional parenting practices, depression, anxiety, stress, and the perceived level of parenting difficulty, as well as in improving parenting confidence, among Japanese families.     

Effects of transcranial magnetic stimulation to the reciprocal Ia inhibitory interneurones in the human wrist

In humans, which neural volleys strongly activate the reciprocal Ia inhibitory interneurones have not been clarified via the corticospinal tract or from the muscle spindles. We examined the inhibition from the corticospinal tract and antagonist group Ia fibres to alpha motoneurone pools using the combined method of transcranial magnetic stimulation (TMS) and the standard H-reflex technique. The test stimulus for the forearm H-reflex and the conditioning stimulus to antagonist muscle afferents were applied to the median and radial nerves, respectively. The transcranial magnetic stimulation was applied noninvasively over the left motor cortex. The radial nerve conditioning strongly suppressed the H-reflex rather than the transcranial magnetic stimulation. Transcranial magnetic stimulation-induced inhibition was disinhibited by the conditioning stimulus applied to the median nerve. To estimate the subliminal inhibition produced by the transcranial magnetic stimulation, we used the following method: the radial nerve conditioning was altered among several different intensities, while transcranial magnetic stimulation intensity was fixed at that for which transcranial magnetic stimulation-induced inhibition was observable. A minor subliminal inhibition was observed. These results suggest that the corticospinal excitatory inputs to reciprocal Ia inhibitory interneurones in the human wrist are very weak relative to those of the originating group I muscle afferents.     

Response preparation and stimulus-response congruence to fractionating reaction time of upper and lower limbs

We measured the fractionating reaction time for upper and lower limbs of 18 young men, using an electromyogram to clarify the interaction of response preparation and stimulus-response congruence on premotor and motor time. The reaction time was divided into two periods with respect to the onset of the electromyogram, premotor and motor components. Manipulating the probability of the Go versus NoGo signals varied three different amounts of response preparation. Prior to the imperative stimulus, precue information about the position of a stimulus was presented. In the stimulus-response congruent task, subjects were required to release a key on the same side of the body using either an upper or lower limb in response to an imperative Go stimulus. In the stimulus-response incongruent task, subjects were required to act in a reverse manner. Subjects were not supposed to respond to the NoGo stimulus. The premotor time of the upper and lower limb responses was affected by the respective effects of response preparation and stimulus-response congruence. The motor time of the upper and lower limb responses increased as the probability of the Go signal decreased but not in relation to stimulus-response congruence. These results suggest that response preparation affects not only information processing time but also peripheral motor activity due to motor programming, and that the stimulus-response congruence effect on motor time disappears when information about the position of the imperative stimulus is precued.