HARKing's Threat to Organizational Research: Evidence From Primary and Meta‐Analytic Sources

We assessed presumed consequences of hypothesizing after results are known (HARKing) by contrasting hypothesized versus nonhypothesized effect sizes among 10 common relations in organizational behavior, human resource management, and industrial and organizational psychology research. In Study 1, we analyzed 247 correlations representing 9 relations with individual performance in 136 articles published in Journal of Applied Psychology and Personnel Psychology and provide evidence that correlations are significantly larger when hypothesized compared to nonhypothesized. In Study 2, we analyzed 281 effect sizes from a meta‐analysis on the job satisfaction–job performance relation and provide evidence that correlations are significantly larger when hypothesized compared to nonhypothesized. In addition, in Study 2, we documented that hypothesized variable pairs are more likely to be mentioned in article titles or abstracts. We also ruled out 13 alternative explanations to the presumed HARKing effect pertaining to methodological (e.g., unreliability, publication year, research setting, research design, measure contextualization, publication source) and substantive (e.g., predictor–performance pair, performance measure, satisfaction measure, occupation, job/task complexity) issues. Our results suggest that HARKing seems to pose a threat to research results, substantive conclusions, and practical applications. We offer recommended solutions to the HARKing threat.     

Of mice and marbles: Novel perspectives on burying behavior as a screening test for psychiatric illness

Burying forms part of the normal behavioral routine of rodents, although its expression is species-specific. However, it has been suggested that aberrant burying behavior, of which marble-burying (MB) is an example, may represent neophobic and/or compulsive-like behavior. In the present investigation, we assessed MB in an established animal model of obsessive–compulsive disorder (OCD)—namely, spontaneous stereotypy in the deer mouse—to establish whether high (H) stereotypy is associated with neophobia and/or another compulsive endophenotype, i.e. MB, as compared to nonstereotypical (N) controls. A three-trial, one-zone MB test was performed over three consecutive evenings both before and after chronic treatment with high-dose (50 mg/kg/day) oral escitalopram. Neophobia was measured via the number of marbles buried during the first pre- and posttreatment MB trials, and compulsive-like behavior via the number of marbles buried over all pre- and posttreatment MB trials. The data from the present study support earlier findings that burying is a normal behavioral routine (inherent burying behavior, IBB) that is expressed by all deer mice, irrespective of stereotypical cohort, and is not associated with either neophobia or compulsiveness. Indeed, chronic escitalopram treatment, which is similarly effective in treating clinical anxiety and OCD, as well as in attenuating H behavior, failed to influence IBB. Although 11 % of the animals presented with a unique burying endophenotype (high burying behavior), escitalopram also failed to attenuate said behavior, necessitating further investigation as to its relevance. In conclusion, MB cannot be regarded as a measure of anxiety-like or compulsive behavior in the deer mouse model of OCD.     

Stimulus–response correspondence effect as a function of temporal overlap between relevant and irrelevant information processing

The stimulus–response correspondence (SRC) effect refers to advantages in performance when stimulus and response correspond in dimensions or features, even if the common features are irrelevant to the task. Previous research indicated that the SRC effect depends on the temporal course of stimulus information processing. The current study investigated how the temporal overlap between relevant and irrelevant stimulus processing influences the SRC effect. In this experiment, the irrelevant stimulus (a previously associated tone) preceded the relevant stimulus (a coloured rectangle). The irrelevant and relevant stimuli onset asynchrony was varied to manipulate the temporal overlap between the irrelevant and relevant stimuli processing. Results indicated that the SRC effect size varied as a quadratic function of the temporal overlap between the relevant stimulus and irrelevant stimulus. This finding extends previous experimental observations that the SRC effect size varies in an increasing or decreasing function with reaction time. The current study demonstrated a quadratic function between effect size and the temporal overlap.     

高压氧对小鼠学习记忆及脑细胞形态结构的影响

实验用两种行为模型（旷场行为模型和Ｙ－迷宫分辨学习模型）观察了幼龄小鼠在不同压力的高压氧处理后,对新异环境的探究行为和自发活动情况,以及学习记忆能力的变化;并用ＸＹ－生物医学电脑图像分析仪分析了与学习记忆相关的脑区（大脑皮层、海马）神经元密度,细胞核面积,胞核／胞浆比值的变化。结果表明：（１）与对照组相比,吸０.１ＭＰａ高压氧的幼鼠学习记忆能力明显提高,相关脑区的神经元密度、细胞核面积、胞核／浆比均显著增加。（２）吸０.２５ＭＰａ高压氧的幼鼠学习记忆能力与对照组相比无明显变化,但其在新异环境中的自发行为明显减少。提示：慢性吸入０.１ＭＰａ高压氧有利于促进幼鼠脑的生长发育,增强脑功能活动。     

Mothers' representations of their 13-month-old twins and child-raising attitudes

The purpose of this study was to describe maternal representations of the twin sibling relationship and of the children's differences and similarities. Mothers' mental representations were also analyzed with regard to two aspects of their child-raising attitudes: individualization of childcare routines, and the question of differentiation by “external signs of twinship” (dress, toys, and first names). Data from interviews with 44 mothers of twins conducted 13 months after the birth were analyzed in terms of 8 categories—complicity, rivalry/jealousy, agonistic relations, dominance, imitation, physical appearance, development, and personality. A multiple correspondence analysis of the data pointed out that the first dimension describing the mothers' representations concerns the contrast between the “unalike” representation of dizygotic twins and the “alike” representation of monozygotic twins. The second dimension corresponds to the casual, twinship-minimizing representations generated by the twin condition. Two other dimensions express the issues of aggression and dominance. The relationship between the child-raising behavior of the mothers and their representations of the twin couple turned out to be more complex than expected. The results are discussed in terms of the specificity of the psychological issues facing mothers of twins. Defense mechanisms used by some mothers to cope with the exceptional nature of the twin phenomenon are also suggested. © 1998 Michigan Association for Infant Mental Health     

The impact of bundle comparisons on bundle preference

The bundling literature largely holds that a person's reaction to a given product bundle depends only on the characteristics of the products contained in the bundle. This paper, instead, proposes that people evaluate bundles in reference to other bundles that they have seen. Prior research indicates that people are sensitive to a bundle's “attribute inventory” or the aggregate level of comparable attributes possessed by its constituent products. We show that when people evaluate a bundle, they compare the attribute inventories that it offers to those offered by other bundles that they have seen. The resulting compositional comparisons can occur without changes to the products that comprise the target and contextual bundles, vary by attribute comparability and attentional focus, and coexist with (and at times reverse the effects of) well‐established product‐specific context effects, which are determined solely by the products and their attributes.