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41.
Mark Manning 《Psychology & health》2013,28(9):1173-1187
Evidence suggests that more depressed breast cancer patients will less likely adhere to treatment plans. This study presents evidence that the theory of planned behaviour mediates the relation between depression and intentions to adhere to treatment plans and between depression and lack of adherence to medication regime. Two hundred and thirteen women undergoing breast cancer treatment participated in this study. Measures of depressive symptoms and planned behaviour variables were collected at the first time point; measures of medication adherence were collected at the second time point. Structural equation models were utilised to fit the data to the proposed models. Depressive symptoms were significantly correlated to both intentions and medication adherence. In support of hypotheses, the relation between depressive symptoms and treatment intention was mediated by attitudes towards health maintenance plans. The relation between depressive symptoms and medication adherence was fully mediated by the planned behaviour process. Conditions under which treatment intentions and perceptions of control in adhering to treatment were most related to medication adherence were elucidated. The results point to avenues for interventions to increase medication adherence among breast cancer patients. Manipulating attitudes and perceptions of control towards treatment plans will potentially serve to increase medication adherence. 相似文献
42.
Monosynaptic Hoffman reflexes (H reflexes) were recorded from the soleus muscle during the response latency of a warned reaction time (RT) task that required plantarflexion of the foot. The task was done under four conditions of predictability of the response signal (RS), created by the factorial combination of foreperiod duration (1 and 4 s) and variability (fixed and variable). RT varied systematically with RS predictability and was facilitated in conditions that favored prediction of the RS. The response latency was divided into two successive phases by the onset of reflex augmentation: a premotor phase of constant reflex amplitude and a succeeding motor phase marked by progressively increasing reflex amplitude. Reflex augmentation during the motor phase was coupled more closely to the imminent movement than to the preceding signal to respond. The duration of the premotor phase was unaffected by RS predictability, but the duration of the motor phase (like RT) was shorter when the RS was more predictable. The maximum H reflex amplitude reached during the motor phase was greater when the RS was more predictable. The tonic level of H reflex amplitude during the premotor phase was greater in conditions that made prediction of the RS difficult. A second experiment showed that this difference was present throughout the foreperiod.These results suggest that conditions that favor prediction of the RS enhance motor preparation. Changes in motor preparation (which affect RT) affect the processes underlying reflex augmentation in the motor phase. Enhanced preparation may allow more efficient organization of the descending commands to move, causing higher levels of spinal excitability to be reached in a briefer time. The higher tonic reflex amplitudes in the premotor phase and throughout the preceding foreperiod, in conditions that make prediction of the RS difficult, appear to reflect heightened general arousal. 相似文献
43.
Children on the autism spectrum update their behaviour in response to a volatile environment
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Catherine Manning Louise Neil Themelis Karaminis Elizabeth Pellicano 《Developmental science》2017,20(5)
Typical adults can track reward probabilities across trials to estimate the volatility of the environment and use this information to modify their learning rate (Behrens et al., 2007). In a stable environment, it is advantageous to take account of outcomes over many trials, whereas in a volatile environment, recent experience should be more strongly weighted than distant experience. Recent predictive coding accounts of autism propose that autistic individuals will demonstrate atypical updating of their behaviour in response to the statistics of the reward environment. To rigorously test this hypothesis, we administered a developmentally appropriate version of Behrens et al.'s (2007) task to 34 cognitively able children on the autism spectrum aged between 6 and 14 years, 32 age‐ and ability‐matched typically developing children and 19 typical adults. Participants were required to choose between a green and a blue pirate chest, each associated with a randomly determined reward value between 0 and 100 points, with a combined total of 100 points. On each trial, the reward was given for one stimulus only. In the stable condition, the ratio of the blue or green response being rewarded was fixed at 75:25. In the volatile condition, the ratio alternated between 80:20 and 20:80 every 20 trials. We estimated the learning rate for each participant by fitting a delta rule model and compared this rate across conditions and groups. All groups increased their learning rate in the volatile condition compared to the stable condition. Unexpectedly, there was no effect of group and no interaction between group and condition. Thus, autistic children used information about the statistics of the reward environment to guide their decisions to a similar extent as typically developing children and adults. These results help constrain predictive coding accounts of autism by demonstrating that autism is not characterized by uniform differences in the weighting of prediction error. 相似文献
44.
The frequently observed link between maternal depressive symptoms and heightened maternal reporting of adolescent externalizing behavior was examined from an integrative, systems perspective using a community sample of 180 adolescents, their mothers, fathers, and close peers, assessed twice over a 3-year period. Consistent with this perspective, the maternal depression-adolescent externalizing link was found to reflect not simply maternal reporting biases, but heightened maternal sensitivity to independently observable teen misbehavior as well as long-term, predictive links between maternal symptoms and teen behavior. Maternal depressive symptoms predicted relative increases over time in teen externalizing behavior. Child effects were also found, however, in which teen externalizing behavior predicted future relative increases in maternal depressive symptoms. Findings are interpreted as revealing a tightly linked behavioral-affective system in families with mothers experiencing depressive symptoms and teens engaged in externalizing behavior and further suggest that research on depressive symptoms in women with adolescent offspring should now consider offspring externalizing behaviors as a significant risk factor. 相似文献
45.
Lydia Manning Morgan Ferris Carla Narvaez Rosario Molly Prues Lauren Bouchard 《Journal of Religion, Spirituality & Aging》2019,31(2):168-186
Spirituality is important to a large percentage of the older adult population and serves as a key factor of resilience. Using qualitative research, we conducted and analyzed interviews with 64 participants willing to discuss their experiences with adversity. Participants ranged in age from 52 to 93 with a mean age of 74. For the purposes of this study, we analyzed 46 of the 64 interviews, selecting participants who indicated that spirituality was an important resource for managing hardship. The researchers examined the connections between spirituality and resilience. Using in-depth interviews, we explored the interplay between spirituality and resilience and the importance spirituality plays in dealing with adversity and hardship. A grounded theory analysis of the 46 interviews was performed. Major findings include participants’ use of spirituality as a tool to promote and maintain resilience in late life in five key domains: reliance on relationships, spiritual transformation, spiritual coping, power of belief, and commitment to spiritual values and practices. Results are presented as an interpretation of the participants’ perceptions of their spirituality, and indicate their reliance on spirituality to overcome hardship. In addition, we discuss the connections between spirituality and resilience and how these connections play out in the lives of older adults when considering their generational and cohort status. The roles these two constructs play in the lives of older adults are considered. 相似文献
46.
47.
Karen A. Manning Lorrin A. Riggs Julieane K. Komenda 《Attention, perception & psychophysics》1983,34(3):250-256
Voluntary blinks are known to be accompanied by visual suppression that arises, at least in part, through nonretinal processes. We wanted to test the hypothesis that this suppression must arise as a corollary to the voluntary command to blink. We therefore examined visual sensitivity at the time of a blink that does not involve a voluntary command, namely the corneal reflex elicited by a puff of air. We found that sensitivity was reduced during these reflex blinks; the magnitude and time course of suppression were similar to those of voluntary blinks. We therefore adopt the view that visual suppression stems from signals from the common, efferent, blink pathway. 相似文献
48.
In order to test a model describing the occurence of fluency breaks throughout the life cycle, spontaneous speech samples of 40 nonstutterers and 4 stutterers above the age of 50 were perceptually analyzed. Fluency breaks were classified into categories of formulative or motoric breaks. The results supported research, noting an increase in formulative fluency breaks (especially fillers and interjections) for older speakers. There was, however, a significant decrease in the occurence of formulative fluency breaks during the final years of late adulthood. No change was found in the occurence of motoric fluency breaks in the nonstuttering speakers. Stuttering speakers had significantly less formulative breaks and significantly more motoric breaks than nonstuttering speakers. 相似文献
49.
Alexander A. Manning Charles J. Vierck Jr. 《Journal of the experimental analysis of behavior》1973,19(1):125-132
Cebus albifrons monkeys received electrical stimulation of the hindlimbs over a wide range of intensities. On trials signalled by a blue light, the animals were permitted to escape shock by pressing a disc, or shock was terminated after 8 sec (free escape). Escape force (disc pressure) was found to increase as stimulation intensity increased well beyond escape threshold, while shock duration curves reached plateau at the mid-range of intensities. The shock duration curves generated by free escape responses should be comparable to pain detection functions obtained by similar operations in humans, and the curves were stable over months of testing, as is generally found in pain-detection studies. On trials signalled by a red light, the animals received intense tail shock immediately after escape responses (punished escape), or, if they endured leg shock for 8 sec without escaping, then they could avoid tail shock with a panel press. The shock duration curves generated by punished escape responses should be comparable to pain tolerance functions as defined for human subjects, and the escape thresholds were considerably higher on red-light trials. As in human studies, the tolerance curves were not stable over repeated testing sessions, and some feature of the paradigm forced a progression toward extremely high levels of tolerance. 相似文献
50.
Susan Karp Manning 《Behavior research methods》1973,5(3):263-265
A design is derived which equates the normally differing chance levels of alternation in the free- and forced-trial paradigms. Using 37 rats, this design was used to compare alternation levels in the two paradigms at two interchoice intervals. Forced-trial alternation was found to be significantly higher and longer lasting than free-trial alternation. It is suggested that the methodology presented here be considered by future researchers dealing with the two paradigms. 相似文献