The resolution of two paradoxes by approximate reasoning using a fuzzy logic

Summary The method of approximate reasoning using a fuzzy logic introduced by Baldwin (1978 a,b,c), is used to model human reasoning in the resolution of two well known paradoxes.It is shown how classical propositional logic fails to resolve the paradoxes, how multiple valued logic partially succeeds and that a satisfactory resolution is obtained with fuzzy logic.The problem of precise representation of vague concepts is considered in the light of the results obtained.     

Affect and memory in young children

The state-dependent theory of the relationship between affective states and memory holds that recall will be best when the affective state at recall matches that during learning. Sequential happy, neutral, and sad affective states that were either consistent (e.g., Happy-Happy) or inconsistent (e.g., Sad-Neutral) were experimentally induced in preschool children prior to encoding and then again prior to retrieval (free and cued recall, recognition memory). Facial ratings indicated that the inductions were effective in inducing affect. Nevertheless, emotional states did not influence children's ability to recall items under free or cued conditions, and recognition memory was essentially perfect for all subjects. Thus, there was no evidence for state-dependent learning or for a positive loop between subjects' positive affect at retrieval and memory for positively rated information. Results are discussed in terms of the generally inconsistent findings in the literature on the role of affect in children's memory and factors that may limit affective state-dependent learning in children.This research was supported by Research Grant No. 11776 from the National Institute of Child Health and Human Development to Marion Perlmutter, by Grant BNS 78-01108 from the National Science Foundation to John C. Masters, and by Program Project Grant No. 0527 to the Institute of Child Development. Wayne Duncan is now at the University of Denver, and Christine Todd is now at the University of Illinois, Urbana. Marion Perlmutter is now at the University of Michigan. We would like to thank Keith Elliott and LuAnne Tczap for their work as experimenters; Jule Kogan, Carol Revermann, and Sonya Hernandez for their help in coding data; and Jayne Grady-Reitan for her administrative assistance throughout the study.     

Surveying the forest: A meta‐analysis,moderator investigation,and future‐oriented discussion of the antecedents of voluntary employee turnover

Recent narrative reviews (e.g., Hom, Mitchell, Lee, and Griffeth, 2012; Hom, Lee, Shaw, and Hausknecht, 2017) advise that it is timely to assess the progress made in research on voluntary employee turnover so as to guide future work. To provide this assessment, we employed a three‐step approach. First, we conducted a comprehensive meta‐analysis of turnover predictors, updating existing effect sizes and examining multiple new antecedents. Second, guided by theory, we developed and tested a set of substantive moderators, considering factors that might exacerbate or mitigate zero‐order meta‐analytic effects. Third, we examined the holistic pattern of results in order to highlight the most pressing needs for future turnover research. The results of Step 1 reveal multiple newer predictors and updated effect sizes of more traditional predictors, which have received substantially greater study. The results of Step 2 provide insight into the context‐dependent nature of many antecedent–turnover relationships. In Step 3, our discussion takes a bird's‐eye view of the turnover “forest” and considers the theoretical and practical implications of the results. We offer several research recommendations that break from the traditional turnover paradigm, as a means of guiding future study.     

“I Didn’t Expect to Learn as Much as I Did”: Rewards of Caregiving in Young Adulthood

While much attention is given to unpaid caregivers in midlife, there is a notable gap in the literature regarding young adults in family caregiving roles. Although two out of 5 family caregivers are between the ages of 18 and 40, we know relatively little about these younger relatives providing support to ill and disabled family members. Understanding the experiences of this under-researched population is critical to effective social service provision for this new wave of caregivers. In addition, the challenges associated with caregiving are well documented, yet examining the positive aspects of caregiving is necessary to provide a balanced picture of caregiving. The purpose of this qualitative study was to explore the gains experienced by family caregivers in young adulthood. In-depth telephone interviews were conducted with a diverse sample of 22 individuals who were (or had previously been) caregivers while in young adulthood. Analysis of the data resulted in identification of four themes concerning gains experienced by young adult caregivers: a strengthening of family relationships, character growth, personal satisfaction in the care provided, and material benefit. This study sheds some understanding on rewards experienced by a subgroup of family caregivers who has received little attention—young adult caregivers.     

Metaphors can give life meaning

Conceptual metaphor theory offers a perspective on how and when people find meaning in life. Whereas life’s meaning can be difficult to grasp, metaphor compares life to a relatively more concrete and structured concept. Supporting this account, American adults (Study 1) and German undergraduates (Study 2) who framed life as a journey reported more meaning in life. The journey metaphor was particularly beneficial for individuals with low levels of perceived coherence in life (Study 2). Study 3 further explored this pattern of moderation: An accessible metaphor, compared to other life framings, benefited participants who lack a strong meaning framework. Study 4 focused on the mechanism behind metaphor’s influence. Participants who imagined events from their life journey perceived stronger interrelatedness among those events as measured with an analog spatial organization task. Perceived interrelatedness in turn predicted meaning in life, particularly for individuals with a strong preference for well-structured knowledge. Finally, participants who applied their own metaphor to life expressed greater meaning (Study 5), especially those high in personal need for structure (Study 6). An internal meta-analysis of these findings provides cumulative evidence for metaphor’s influence on perceived meaning in life and reveals moderating features of the individual.     

Glucose levels are not associated with common features-derived prototype memory abstractions

Elevated glucose levels are associated with increased recall on declarative memory tasks. No previous studies have examined such a relationship using a common features-derived prototype memory abstraction task. 20 participants volunteered, 10 each in an experimental group who were given 40 g of glucose to drink and a control group given an artificially sweetened beverage after fasting. Analysis indicated that common features-derived prototype memory abstractions seem resistant to glucose fluctuations.