On the Overuse and Misuse of Mediation Analysis: It May Be a Matter of Timing

Kenny (2008) credited Hyman (1955 Hyman, H. (1955). Survey design and analysis: Principles, cases and procedures. Glencoe, IL: The Free Press. [Google Scholar]) with originally discussing mediation analysis under the name elaboration. Of importance, Hyman's elaboration required a time-ordered relationship among variables, such that the mediator must always intervene in time between the predictor and outcome. However, in the modern discussions of mediation (e.g., Baron & Kenny, 1986 Baron, R., & Kenny, D. A. (1986). The moderator–mediator variable distinction in social psychological research: Conceptual, strategic, and statistical considerations. Journal of Personality and Social Psychology, 51, 1173–1182. doi:10.1037/0022-3514.51.6.1173[Crossref], [PubMed], [Web of Science ®] , [Google Scholar]; Preacher & Hayes, 2004 Preacher, K. J., & Hayes, A. F. (2004). SPSS and SAS procedures for estimating indirect effects in simple mediation models. Behavior Research Methods, Instruments, & Computers, 36, 717–731. doi:10.3758/bf03206553[Crossref], [PubMed] , [Google Scholar]), this crucial point about time-ordered relationships appears to be underemphasized. This article shows that by employing a conceptual timing criterion for all mediation analyses, the overuse of this technique can be curbed, and, simultaneously, researchers will understand when mediation analyses are appropriate across the behavioral and medical science literatures.     

Priming the trait category “hostility”: The moderating role of trait anxiety

Recent studies on affective priming with the naming task have revealed an influence of trait anxiety on the direction of affective priming effects (e.g., Berner & Maier, 2004 Berner, M. P. and Maier, M. A. 2004. The direction of affective priming as a function of trait anxiety when naming target words with regular and irregular pronunciation. Experimental Psychology, 51: 180–190. [Crossref], [PubMed], [Web of Science ®] , [Google Scholar]). This moderating role of trait anxiety was further investigated in a study employing a conceptual priming task. After masked presentation of either hostile or neutral primes, participants performed a person judgment task. As expected, the direction of the hostility rating difference score, defined as the difference between hostility ratings of a target person in the hostility priming condition and in the neutral priming condition, changed from positive to negative with increasing levels of self-reported trait anxiety. The findings are interpreted in terms of salience-dependent overcorrection processes (Glaser & Banaji, 1999 Glaser, J. and Banaji, M. R. 1999. When fair is foul and foul is fair: Reverse priming in automatic evaluation. Journal of Personality and Social Psychology, 77: 669–687. [Crossref], [PubMed], [Web of Science ®] , [Google Scholar]). Implications for our understanding of the cognitive functioning in high trait anxiety are discussed.     

Commentary Research on gene–environment interdependence: Honing the tools and examining the angles

The insightful overview by Sir Michael Rutter (this issue) on gene–environment interdependence comes about 10 years after the breakthrough Science publications on gene–environment interactions (G×E) involving the MAOA and 5-HTT genes by Caspi et al. (2002 Caspi, A., McClay, J., Moffitt, T. E., Mill, J., Martin, J.Craig, I. W. 2002. Role of genotype in the cycle of violence in maltreated children. Science, 297: 851–854. [Crossref], [PubMed], [Web of Science ®] , [Google Scholar], 2003 Caspi, A., Sugden, K., Moffitt, T. E., Taylor, A., Craig, I. W.Harrington, H. 2003. Influence of life stress on depression: Moderation by a polymorphism in the 5-HTT gene. Science, 301: 386–389. [Crossref], [PubMed], [Web of Science ®] , [Google Scholar]). Since then, a field of research has burgeoned that has produced replications as well as intriguing new evidence of gene–environment interdependence. At the same time, however, the field has witnessed a growing scepticism about the relevance of studying gene–environment interactions and has seen replication failures (see Duncan & Keller, 2011 Duncan, L. E. and Keller, M. C. 2011. A critical review of the first 10 years of candidate gene-by-environment interaction research in psychiatry. American Journal of Psychiatry, 168: 1041–1049. [Crossref], [PubMed], [Web of Science ®] , [Google Scholar]; Risch et al., 2009 Risch, N., Herell, R., Lehner, T., Liang, K.-Y., Eaves, L.Hoh, J. 2009. Interaction between the serotonin transporter gene (5-HTTLPR), stressful life events, and risk of depression: A meta-analysis. Journal of the American Medical Association, 301: 2462–2471. [Crossref], [PubMed], [Web of Science ®] , [Google Scholar]). Against this backdrop, we comment and elaborate on several of the key issues raised by Rutter, and suggest some directions for future research on G×E. Specifically, we discuss (1) replication issues; (2) the crucial role of experiments in understanding gene–environment interdependence; (3) current unknowns with regard to differential susceptibility; and (4) clinical and practical implications of G×E research.     

Homophonic context effects when naming Japanese kanji: evidence for processing costs?

The current study investigated the effects of phonologically related context pictures on the naming latencies of target words in Japanese and Chinese. Reading bare words in alphabetic languages has been shown to be rather immune to effects of context stimuli, even when these stimuli are presented in advance of the target word (e.g., Glaser & Düngelhoff, 1984 Glaser, W. R. and Düngelhoff, F. J. 1984. The time course of picture–word interference. Journal of Experimental Psychology: Human Perception and Performance, 10: 640–654. [Crossref], [PubMed], [Web of Science ®] , [Google Scholar]; Roelofs, 2003 Roelofs, A. 2003. Goal-referenced selection of verbal action: Modeling attentional control in the Stroop task. Psychological Review, 110: 88–125. [Crossref], [PubMed], [Web of Science ®] , [Google Scholar]). However, recently, semantic context effects of distractor pictures on the naming latencies of Japanese kanji (but not Chinese hànzì) words have been observed (Verdonschot, La Heij, & Schiller, 2010 Verdonschot, R. G., La Heij, W. and Schiller, N. O. 2010. Semantic context effects when naming Japanese kanji, but not Chinese hànzì. Cognition, 115: 512–518. [Crossref], [PubMed], [Web of Science ®] , [Google Scholar]). In the present study, we further investigated this issue using phonologically related (i.e., homophonic) context pictures when naming target words in either Chinese or Japanese. We found that pronouncing bare nouns in Japanese is sensitive to phonologically related context pictures, whereas this is not the case in Chinese. The difference between these two languages is attributed to processing costs caused by multiple pronunciations for Japanese kanji.     

Local and global processing biases fail to influence face,object, and word recognition

Three studies investigated whether encouraging people to use either global or local processing using the Navon task (Navon, 1977 Navon, D. 1977. Forest before the trees: The precedence of global features in visual perception. Cognitive Psychology, 9: 353–383. [Crossref], [Web of Science ®] , [Google Scholar]) influenced recognition memory for upright and inverted pictures of faces, objects, and words. Contrary to the striking results of Macrae and Lewis (2002 Macrae, C. N. and Lewis, H. L. 2002. Do I know you? Processing orientation and face recognition. Psychological Science, 13: 194–196. [Crossref], [PubMed], [Web of Science ®] , [Google Scholar]), no effect of such cross-task processing biases were found. In particular, encouraging global processing did not improve the recognition of upright faces, whilst encouraging local processing failed to improve the recognition of words. These results suggest that using the Navon task to manipulate people's processing strategy typically does not have a large, consistent effect on recognition memory. Instead, prior performance of an unrelated task may only influence subsequent recognition memory under restricted circumstances. Therefore, the cross-task processing bias effect does not provide researchers with a powerful, reliable tool with which to investigate the relative importance of local versus global, configural processing of visual stimuli.     

Transfer Effects in Children's Recall of Arithmetic Facts

Predictions of the Identical Elements (IE) model of arithmetic fact representation (Rickard, 2005 Rickard, T. C. 2005. A revised identical elements model of arithmetic fact representation. Journal of Experimental Psychology: Learning, Memory, and Cognition, 31: 250–257. [Crossref], [PubMed], [Web of Science ®] , [Google Scholar]; Rickard & Bourne, 1996 Rickard, T. C. and Bourne, L. E. 1996. Some tests of an identical elements model of basic arithmetic skills. Journal of Experimental Psychology: Learning, Memory, and Cognition, 22: 1281–1295. [Crossref], [PubMed], [Web of Science ®] , [Google Scholar]) about transfer between arithmetic facts were tested in primary school children. The aim of the study was to test whether the IE model, constructed to explain adult performance, also applies to children. The IE model predicts no positive transfer when the numerical elements of a test problem do not match exactly with those of a practice problem. In two experiments, children practiced addition or multiplication problems. A large positive transfer effect was found for problems with an operand order change; improvement was just as high as for practiced problems. Smaller transfer effects were found for problems where one operand was increased with one unit and for problems with operands more different from practice problems. Analogous results were found for addition and multiplication, suggesting that storage and retrieval processes in both domains are similar in children. The findings suggest that there is a gradual decrease in transfer as the test problems become more different from practice problems, indicating that a more sophisticated model than the IE model is needed to explain transfer effects in children's recall of arithmetic facts.     

Recollection Training and Transfer Effects in Older Adults: Successful Use of a Repetition-Lag Procedure

Abstract

We examined an approach aimed at training consciously-controlled recollection, introduced by Jennings and Jacoby (2003) Jennings, J. M. and Jacoby, L. L. 2003. Improving memory in older adults: Training recollection. Neuropsychological Rehabilitation, 13: 417–440. [CSA][CROSSREF][Taylor & Francis Online], [Web of Science ®] , [Google Scholar], for its ability to replicate and generalize. A continuous recognition task, requiring recollection to identify the occurrence of repeated items over gradually increasing lag intervals (number of intervening items between the first and second presentation of a repeated word), was given to a group of older adults twice a week for three weeks. Pre-and-post training performance was assessed on multiple measures and compared with a recognition practice and no contact control group. Recollection training proved successful; accurate identification of repeated items increased across a lag interval of 2 to 18 intervening items. Post-training gains following recollection training were found on n-back, self-ordered pointing, source discrimination and digit symbol substitution, but not with reading span or the CVLT-II. No changes were identified in the other groups. Gains from recollection training seem to transfer successfully in older adults.     

If only I had taken my usual route… : Age-related differences in counter-factual thinking

ABSTRACT

Previous research suggests that young adults can shift between rational and experiential modes of thinking when forming social judgments. The present study examines whether older adults demonstrate this flexibility in thinking. Young and older adults completed an If-only task adapted from Epstein, Lipson, and Huh's (1992 Epstein, S., Lipson, A. and Huh, E. 1992. Irrational reactions to negative outcomes: Evidence for two conceptual systems. Journal of Personality and Social Psychology, 62: 328–339. doi:10.1037/0022-3514.62.2.328[Crossref], [PubMed], [Web of Science ®] , [Google Scholar], Journal of Personality and Social Psychology, 62, 328) examination of individuals' ability to adopt rational or experiential modes of thought while making a judgment about characters who experience a negative event that could have been avoided. Consistent with our expectations for their judgments of the characters, young adults shifted between experiential and rational modes of thought when instructed to do so. Conversely, regardless of the mode of thought being used or the order with which they adopted the different modes of thought (i.e., shifting from experiential to rational in Study 1 and from rational to experiential in Study 2), older adults consistently offered judgments and justifications that reflected a preference for experiential-based thought.     

Testing the associative-link hypothesis in immediate serial recall: Evidence from word frequency and word imageability effects

Two immediate serial recall experiments were conducted to test the associative-link hypothesis (Stuart & Hulme, 2000 Stuart, G. and Hulme, C. 2000. The effects of word co-occurrence on short-term memory: Associative-links in long-term memory affect short-term memory performance. Journal of Experimental Psychology: Learning, Memory, and Cognition, 26: 796–802. [Crossref], [PubMed], [Web of Science ®] , [Google Scholar]). We manipulated interitem association by varying the intralist latent semantic analysis (LSA) cosines in our 7-item study word lists, each of which consists of high- or low-frequency words in Experiment 1 and high- or low-imageability words in Experiment 2. Whether item recall performance was scored by a serial-recall or free-recall criterion, we found main effects of interitem association, word imageability, and word frequency. The effect of interitem association also interacted with the word frequency effect, but not with the word imageability effect. The LSA-cosine×word frequency interaction occurred in the recency, but not primacy, portion of the serial position curve. The present findings set explanatory boundaries for the associative-link hypothesis and we argue that both item- and associative-based mechanisms are necessary to account for the word frequency effect in immediate serial recall.     

Core verbal working-memory capacity: The limit in words retained without covert articulation

Verbal working memory may combine phonological and conceptual units. We disentangle their contributions by extending a prior procedure (Chen & Cowan, 2005 Chen, Z. and Cowan, N. 2005. Chunk limits and length limits in immediate recall: A reconciliation. Journal of Experimental Psychology: Learning, Memory, and Cognition, 31: 1235–1249. [Crossref], [PubMed], [Web of Science ®] , [Google Scholar]) in which items recalled from lists of previously seen word singletons and of previously learned word pairs depended on the list length in chunks. Here we show that a constant capacity of about 3 chunks holds across list lengths and list types, provided that covert phonological rehearsal is prevented. What remains is a core verbal working-memory capacity.     

The Development of Graphophonological-Semantic Cognitive Flexibility and Its Contribution to Reading Comprehension in Beginning Readers

Reading-specific and general color-shape cognitive flexibility were assessed in 68 first and second graders to examine: 1) the development of graphophonological-semantic cognitive flexibility (the ability to process concurrently phonological and semantic aspects of print) in comparison to color-shape cognitive flexibility, 2) the contribution of reading experience to graphophonological-semantic flexibility, and 3) the unique contribution of graphophonological-semantic flexibility to reading comprehension. Second graders scored significantly higher than first graders on both cognitive flexibility tasks; the general flexibility task was easier for all children than the graphophonological-semantic flexibility task; reading experience contributed uniquely to children's graphophonological-semantic flexibility; and graphophonological-semantic flexibility contributed significant, unique variance to children's reading comprehension, consistent with Cartwright's (2002 Cartwright , K. B. ( 2002 ). Cognitive development and reading: The relation of reading-specific multiple classification skill to reading comprehension in elementary school children . Journal of Educational Psychology , 94 , 56 – 63 .[Crossref], [Web of Science ®] , [Google Scholar]) work with second- to fourth-grade students and adults (2007 Cartwright , K. B. ( 2007 ). The contribution of graphophonological-semantic flexibility to reading comprehension in college students: Implications for a less simple view of reading . Journal of Literacy Research , 39 , 173 – 193 .[Crossref], [Web of Science ®] , [Google Scholar]).     

Intentionality Attributions About Perfect and Imperfect Duty Violations

Abstract

Intentionality attributions were explored by drawing on the distinction between perfect and imperfect moral duties. Previous research has shown that perfect duty violations carry greater attributional weight than imperfect duty violations (Trafimow & Trafimow, 1999 Trafimow, D. and Trafimow, S. 1999. Mapping imperfect and perfect duties on to hierarchically and partially restrictive trait dimensions. Personality and Social Psychology Bulletin, 25: 686–695. [Crossref], [Web of Science ®] , [Google Scholar]; Trafimow, Bromgard, Finlay, & Ketelaar, 2005 Trafimow, D., Bromgard, I. K., Finlay, K. A. and Ketelaar, T. 2005. The role of affect in determining the attributional weight of immoral behaviors. Personality and Social Psychology Bulletin, 31: 935–948. [Crossref], [PubMed], [Web of Science ®] , [Google Scholar]). In Studies 1 and 2, the distinction between perfect and imperfect duties was replicated with intentionality judgments, and perfect duty violations received higher intentionality attributions than imperfect duty violations. In Study 3 this effect was reversed by manipulating information about an agent's mental intentions or plans to perform a behavior. That is, participants attributed less intentionality to perfect duty violations compared to imperfect duty violations when a mental intention to perform the behavior was absent.     

Organizational identification and perceived organizational support as mediators of the procedural justice–citizenship behaviour relationship: A cross-cultural constructive replication

This study examined the psychological processes that might underlie the relationship between procedural justice and organizational citizenship behaviour using an integrative approach. In doing so, we focused on the mediating effects of perceived organizational support and organizational identification in the relationship simultaneously. Framed as an integrated test of social exchange and social identity predictions, the hypotheses were tested using two cross-cultural samples (i.e., South Korea and the United States) as well as different operationalizations of the constructs of interest, which meets the criterion of a constructive replication (Lykken, 1968 Lykken, D. 1968. Statistical significance in psychological research. Psychological Bulletin, 70: 151–159. [Crossref], [PubMed], [Web of Science ®] , [Google Scholar]) by two samples (N = 130, 135). Interestingly, the results showed convergence in support of the mediating role of organizational identification, but not perceived organizational support, when the two mediators were included in the model concurrently. These findings indicate that social identity may be the dominant psychological mechanism underlying the relationship between procedural justice and organizational citizenship behaviour in workplaces.     

“I'm Sorry,Please Don't Hurt Me”: Effectiveness of Apologies on Aggression Control

ABSTRACT

The author attempted to replicate Ohbuchi, Kameda, and Agarie's (1989 Ohbuchi, K., Kameda, M and Agarie, N. 1989. Apology as aggression control: Its role in mediating appraisal of and response to harm. Journal of Personality and Social Psychology, 56: 219–227. [Crossref], [PubMed], [Web of Science ®] , [Google Scholar]) study which found that giving an apology, with or without harm removal, reduced aggressive responses among a sample of Japanese college women. The author found similiar results with a U.S. sample of college women. The results provide evidence for cross-cultural similiarity in the effectiveness of apologies in reducing aggressive responses.     

The influence of discrete emotions on judgement and decision-making: A meta-analytic review

During the past three decades, researchers interested in emotions and cognition have attempted to understand the relationship that affect and emotions have with cognitive outcomes such as judgement and decision-making. Recent research has revealed the importance of examining more discrete emotions, showing that same-valence emotions (e.g., anger and fear) differentially impact judgement and decision-making outcomes. Narrative reviews of the literature (Lerner & Tiedens, 2006 Lerner, J. S. and Tiedens, L. Z. 2006. Portrait of the angry decision maker: How appraisal tendencies shape anger's influence on cognition. Journal of Behavioral Decision-Making, 19: 115–137. [Crossref], [Web of Science ®] , [Google Scholar]; Pham, 2007 Pham, M. T. 2007. Emotion and rationality: A critical review and interpretation of empirical evidence. Review of General Psychology, 11(2): 155–178. [Crossref], [Web of Science ®] , [Google Scholar]) have identified some under-researched topics, but provide a limited synthesis of findings. The purpose of this study was to review the research examining the influence of discrete emotions on judgement and decision-making outcomes and provide an assessment of the observed effects using a meta-analytic approach. Results, overall, show that discrete emotions have moderate to large effects on judgement and decision-making outcomes. However, moderator analyses revealed differential effects for study-design characteristics and emotion-manipulation characteristics by emotion type. Implications are discussed.     

The representational space of numerical magnitude: Illusions of length

In recent years, a growing amount of evidence concerning the relationships between numerical and spatial representations has been interpreted, by and large, in favour of the mental number line hypothesis—namely, the analogue continuum where numbers are spatially represented (Dehaene, 1992 Dehaene, S. 1992. Varieties of numerical abilities. Cognition, 44: 1–42. [Crossref], [PubMed], [Web of Science ®] , [Google Scholar]; Dehaene, Piazza, Pinel, & Cohen, 2003 Dehaene, S., Piazza, M., Pinel, P. and Cohen, L. 2003. Three parietal circuits of number processing. Cognitive Neuropsychology, 20: 487–506. [Taylor & Francis Online], [Web of Science ®] , [Google Scholar]). This numerical representation is considered the core of number meaning and, accordingly, needs to be accessed whenever numbers are semantically processed. The present study explored, by means of a length reproduction task, whether besides the activation of lateralized spatial codes, numerical processing modulates the mental representation of a horizontal spatial extension. Mis-estimations of length induced by Arabic numbers are interpreted in terms of a cognitive illusion, according to which the elaboration of magnitude information brings about an expansion or compression of the mental representation of spatial extension. These results support the hypothesis that visuo-spatial resources are involved in the representation of numerical magnitude.     

Interpersonal relationships and irrationality as predictors of life satisfaction

This study examined the association among interpersonal relationships, irrational beliefs, and life satisfaction. Twenty-eight psychotherapy clients and 207 college undergraduates completed measures of interpersonal relations (Outcome Questionnaire; Lambert et al., 1996 Lambert, MJ, Burlingame, GM, Umphress, V, Hansen, NB, Vermeersch, DAClouse, GC. 1996. The reliability and validity of the Outcome Questionnaire. Clinical Psychology and Psychotherapy, 3: 249–258. [Crossref], [Web of Science ®] , [Google Scholar]), irrationality (Rational Behavior Inventory; Shorkey & Whiteman, 1977 Shorkey, CT and Whiteman, VL. 1977. Development of the Rational Behavior Inventory: Initial validity and reliability. Educational and Psychological Measurement, 37: 527–534. [Crossref], [Web of Science ®] , [Google Scholar]), and life satisfaction (The Satisfaction with Life Scale; Diener, Emmons, Larsen, & Griffin, 1985 Diener, E, Emmons, R, Larsen, R and Griffin, S. 1985. The Satisfaction with Life Scale. Journal of Personality Assessment, 49: 71–75. [Taylor & Francis Online], [Web of Science ®] , [Google Scholar]). Results indicated that interpersonal relations predicted life satisfaction, whereas global irrationality was indirectly related to life satisfaction. Specifically, interpersonal relations mediated the association between global irrationality and life satisfaction. Clinicians aiming to foster life satisfaction in their patients are encouraged to carefully assess their social functioning and utilize relationship-enhancing treatments. Targeting irrational thinking may also be necessary to set the stage for and support such interventions.     

Nachtraglichkeit

In this brief introductory essay, Harris and Bass consider the historic correspondence between Merton Gill and Philip M. Bromberg (1979–1981 Bromberg, P. M. 1979. Interpersonal psychoanalysis and regression. Contemporary Psychoanalysis, 15: 647–655. [Taylor & Francis Online], [Web of Science ®] , [Google Scholar]) in light of psychoanalytic developments over the past 30 years, which have included the emergence of Relational Psychoanalysis. The authors consider the ways in which the issues engaged by Bromberg and Gill in the correspondence stimulated by the publication of Bromberg's (1979) Bromberg, P. M. 1979. Interpersonal psychoanalysis and regression. Contemporary Psychoanalysis, 15: 647–655. [Taylor & Francis Online], [Web of Science ®] , [Google Scholar] “Interpersonal Psychoanalysis and Regression” helped shape the development of Relational Psychoanalysis as it emerged, and how the development of Relational Psychoanalysis has provided a new vantage point from which to view these early discussions.     

Detecting objects is easier than categorizing them

Two experiments compared performance in an object detection task, in which participants categorized photographs as objects and nonobject textures, and an object categorization task, in which photographs were categorized into basic-level categories. The basic-level categorization task was either easy (e.g., dogs vs. buses) or difficult (e.g., dogs vs. cats). Participants performed similarly in the detection and the easy-categorization tasks, but response times to the difficult-categorization task were slower. This latter finding is difficult to reconcile with the conclusions of Grill-Spector and Kanwisher (2005) Grill-Spector, G. and Kanwisher, N. 2005. Visual recognition: As soon as you know it is there, you know what it is. Psychological Science, 16: 152–160. [Crossref], [PubMed], [Web of Science ®] , [Google Scholar] who reported equivalent performance on detection and basic-level categorization tasks and took this as evidence that figure–ground segregation and basic-level categorization are mediated by the same mechanism.