Michelangelo Vianello

Response to Comment on "Estimating the reproducibility of psychological science"

Gilbert et al. conclude that evidence from the Open Science Collaboration’s Reproducibility Project: Psychology indicates high reproducibility, given the study methodology. Their very optimistic assessment is limited by statistical misconceptions and by causal inferences from selectively interpreted, correlational data. Using the Reproducibility Project: Psychology data, both optimistic and pessimistic conclusions about reproducibility are possible, and neither are yet warranted.

Elevation at work: The effects of leaders’ moral excellence

Leaders influence followers in many ways; one way is by eliciting positive emotions. In three studies we demonstrate that the nearly unstudied moral emotion of ‘elevation’ (a reaction to moral excellence) mediates the relations between leaders’ and their followers’ ethical behavior. Study 1 used scenarios manipulated experimentally; study 2 examined employees’ emotional responses to their leaders in a natural work setting; study 3 compared the effects of elevation to those of happiness, serenity, and positive affect. We found that leaders’ interpersonal fairness and self-sacrifice are powerful elicitors of elevation, and that this emotion fully mediates leaders’ influence on followers’ organizational citizenship behavior and affective organizational commitment. In the first study, we also observed a moderation effect of interpersonal fairness on self-sacrifice. Results underline the importance of positive moral emotions in organizations and shed light on the emotional process by which ethical leaders can foster positive organizational outcomes.

Overweight People Have Low Levels of Implicit Weight Bias, but Overweight Nations Have High Levels of Implicit Weight Bias

Although a greater degree of personal obesity is associated with weaker negativity toward overweight people on both explicit (i.e., self-report) and implicit (i.e., indirect behavioral) measures, overweight people still prefer thin people on average. We investigated whether the national and cultural context – particularly the national prevalence of obesity – predicts attitudes toward overweight people independent of personal identity and weight status. Data were collected from a total sample of 338,121 citizens from 71 nations in 22 different languages on the Project Implicit website (https://implicit.harvard.edu/) between May 2006 and October 2010. We investigated the relationship of the explicit and implicit weight bias with the obesity both at the individual (i.e., across individuals) and national (i.e., across nations) level. Explicit weight bias was assessed with self-reported preference between overweight and thin people; implicit weight bias was measured with the Implicit Association Test (IAT). The national estimates of explicit and implicit weight bias were obtained by averaging the individual scores for each nation. Obesity at the individual level was defined as Body Mass Index (BMI) scores, whereas obesity at the national level was defined as three national weight indicators (national BMI, national percentage of overweight and underweight people) obtained from publicly available databases. Across individuals, greater degree of obesity was associated with weaker implicit negativity toward overweight people compared to thin people. Across nations, in contrast, a greater degree of national obesity was associated with stronger implicit negativity toward overweight people compared to thin people. This result indicates a different relationship between obesity and implicit weight bias at the individual and national levels.

Preferring thin people does not imply derogating fat people. A rasch analysis of the implicit weight attitude

The meaning of the implicit weight attitude in individuals of different weight by distinguishing the contribution of positive and negative associations to the overall measure was investigated.

Implicit Sexual Attitude of Heterosexual, Gay and Bisexual Individuals: Disentangling the Contribution of Specific Associations to the Overall Measure

The article aims to measure implicit sexual attitude in heterosexual, gay and bisexual individuals. A Many-Facet Rasch Measurement analysis was used to disentangle the contribution of specific associations to the overall IAT measure. A preference for heterosexuals relative to homosexuals is observed in heterosexual respondents, driven most by associating positive attributes with heterosexuals rather than negative attributes with homosexuals. Differently, neither the negative nor the positive evaluation of any of the target groups play a prominent role in driving the preference for homosexuals observed in gay respondents. A preference for heterosexuals relative to homosexuals is observed in bisexual respondents, that results most from ascribing negative attributes to homosexuals rather than positive attributes to heterosexuals. The results are consistent with the expression of the need for achieving a positive self-image and with the influence of shared social norms concerning sexuality.

Positive Associations Primacy in the IAT

Two studies investigated the different contribution of positive and negative associations to the size of the Implicit Association Test (IAT) effect. A Many-Facet Rasch Measurement analysis was applied for the purpose. Across different IATs (Race and Weight) and different groups of respondents (White, Normal weight, and Obese people) we observed that positive words increase the IAT effect whereas negative words tend to decrease it. Results suggest that the IAT is influenced by a positive associations primacy effect. As a consequence, we argue that researchers should be careful when interpreting IAT effects as a measure of implicit prejudice.

Assessing the impact of replication on implicit association test effect by means of the extended logistic model for the assessment of change.

The present study consists of a longitudinal investigation in which implicit association measures were collected by means of the implicit association test (IAT), with the purpose of assessing the impact of replication on the test effect with the same participants. The extended logistic model for the assessment of change (ELMAC), a procedure that belongs to Rasch modeling, was applied. By means of the ELMAC application, the existence of latent traits characteristic of the impact on the IAT effect (due to replication through time) is shown; more precisely, the model time parameters show the decrement of the IAT effect through time, due to the decrease of the implicit preference in both conditions, compatible and incompatible, associated with sweet foods and salty foods. The results confirm that in the long run, the incompatible condition latency may approach the compatible condition latency, causing a significant attenuation of the IAT effect.

Implicit and Explicit Sexual Attitudes Across Genders and Sexual Orientations

This article investigates implicit and explicit sexual attitudes held by individuals of different gender and sexual orientation. The authors found implicit and explicit in-group bias in heterosexual individuals and lesbian women, and explicit but not implicit in-group bias in gay men. Bisexual men implicitly preferred heterosexuals to homosexuals, though bisexual women explicitly preferred homosexuals to heterosexuals. On the whole, bias in favor of heterosexuals was stronger at the implicit (vs. explicit) level and for males (vs. females). The authors interpret these findings in light of the interplay between self-related motives and shared perceptions at a societal level.

A discrimination-association model for decomposing component processes of the implicit association test.

A formal model is proposed that decomposes the Implicit Association Test (IAT) effect into three process components: stimuli discrimination, automatic association, and termination criterion. Both response accuracy and reaction time are considered. Four independent and parallel Poisson processes, one for each of the four label categories of the IAT, are assumed. The model parameters are the rate at which information accrues on the counter of each process and the amount of information that is needed before a response is given. The aim of this study is to present the model and an illustrative application in which the process components of a Coca–Pepsi IAT are decomposed.

A Multi-Method Multi-Trait Test of the Dual-Attitude Perspective

The dual-attitude perspective posits that it is useful for research and theory to assume two distinct constructs: explicit and implicit attitudes (or automatic and deliberate evaluation). Much evidence supports this perspective, but some important tests are missing, casting doubts on studies that relied on the perspective for inference. We used a multimethod multitrait design to extensively test the validity of the dual perspective. The dataset (N = 24,015) included measurements of attitudes in 3 domains (race, politics, the self) with 7 indirect measures, and at least 3 self-report measures for each attitude domain. The dual-attitude model fit the data better than a single-attitude model. Six of the 7 indirect measures were related to the implicit construct more than to the explicit construct. The evidence supports the dual-attitude perspective, bolsters the validation of 6 indirect measures, and clears doubts from countless previous studies that used only one indirect measure to draw conclusions about implicit attitudes.