Notes on Wilhau et al. (2021): Dark Triad, TMX, and Social Loafing in Workplace Teams

Notes on Wilhau et al. (2021): Dark Triad, Team Member Exchange, and Social Loafing in Workplace Teams

  • Context and purpose

    • Study investigates self-reported social loafing (SL) among workplace team members in relation to the Dark Triad (DT) traits: Narcissism, Machiavellianism, and Psychopathy.

    • Examines whether Team Member Exchange (TMX), a social contextual factor, moderates each DT–SL relationship.

    • Adopts a person X situation interactionist perspective (Mischel, 1968).

    • Data collected from American employees using validated scales; correlations and hierarchical regressions used to test hypotheses.

  • Key concepts

    • Social loafing (SL)

    • Definition: decrease in effort or motivation when co-tasked with others (Latané et al., 1979).

    • Rationale for study: loafing reduces group productivity; teams are common in organizations but loafing persists.

    • SL is sometimes called a “social disease” due to its negative impact on team outcomes (Latané et al., 1979).

    • SL is influenced by individual differences, task type, and situational/contextual factors.

    • Dark Triad (DT)

    • Consists of Narcissism, Machiavellianism, and Psychopathy (Paulhus & Williams, 2002).

    • DT traits are socially aversive, sub-clinical, linked to counterproductive workplace behavior (CWBs) and deviant behavior.

    • Overlap among the three traits exists (disagreeableness is a shared element).

    • Narcissism: entitlement, need for admiration, lack of empathy.

    • Machiavellianism: manipulation, cold strategic behavior.

    • Psychopathy: low empathy, high impulsivity.

    • Prior work shows DT traits relate to CWBs; this study extends to SL within teams.

    • Team Member Exchange (TMX)

    • Definition: quality of reciprocal exchange relations among team members (Seers, 1989).

    • High-quality TMX: mutual exchange, commitment, obligation, trust; benefits performance and helping behaviors.

    • TMX may moderate how personality traits translate into behavior, particularly under low vs. high TMX conditions.

    • Theoretical lenses

    • Social Exchange Theory (Blau, 1964): relationships with high-quality TMX yield reciprocal, advantageous behaviors; low-quality TMX may intensify trait-driven behaviors.

    • Trait Activation Theory (Deci & Ryan, 2000; Tett & Burnett, 2003): trait-relevant contexts activate trait-driven behaviors.

    • Person X Situation interactionism (Mischel, 1968): behavior results from the interaction of dispositional traits with situational factors.

  • Hypotheses development

    • H1a–H1c: DT traits will be positively related to SL

    • H1a: Narcissism ⟶ SL (positive)

    • H1b: Machiavellianism ⟶ SL (positive)

    • H1c: Psychopathy ⟶ SL (positive)

    • H2a–H2c: TMX moderates DT trait–SL relations such that high TMX weakens these relationships

    • H2a: TMX moderates Narcissism–SL (weaker with high TMX)

    • H2b: TMX moderates Machiavellianism–SL (weaker with high TMX)

    • H2c: TMX moderates Psychopathy–SL (weaker with high TMX)

  • Method

    • Participants and procedure

    • Sample: 223 American MTurk participants employed in teams, across industries (retail 11.66%, education 10.76%, health 9.87%, etc.).

    • Age: mean 34.90 years (SD = 9.56).

    • Gender: 50.89% male; 49.11% female; majority Caucasian (76.23%);

    • Education: 38.57% with a four-year degree.

    • Work experience: average organization tenure 6.02 years (SD = 5.06); team tenure 4.11 years (SD = 3.35).

    • Recruitment: MTurk; eligibility: US citizenship, ≥20 hours/week paid employment, age 18–65, working in a workplace team.

    • Data collection: longitudinal design with multiple waves; current analyses use Wave 1 data; attention checks included; compensation about $0.88.

    • Measures (5-point scales unless noted)

    • Dark Triad: 27-item Short Dark Triad (SD3) by Jones & Paulhus (2014)

      • Narcissism, Machiavellianism, Psychopathy each measured with separate subscales; reverse-coded items included.

      • Internal consistencies: Narcissism α = 0.77; Machiavellianism α = 0.76; Psychopathy α = 0.77.

    • Team Member Exchange (TMX): 10-item scale (Seers et al., 1995)

      • Sample items: “Other members of my team understand my problems and needs.”; “I make suggestions about work methods to other members of my team.”

      • α = 0.79.

    • Perceived Social Loafing (SL): 10-item scale adapted from George (1992) to assess self-reported loafing in team settings

      • Response format adapted to 5-point Likert (1=Strongly disagree to 5=Strongly agree)

      • α = 0.88.

    • Control variables

    • Gender, Age, Team tenure

    • Two non-focal DT traits controlled when testing each focal DT in regressions (e.g., when testing Narcissism, control for Machiavellianism and Psychopathy)

    • Analysis

    • Descriptive statistics, correlations, and Cronbach’s alphas (Table 1).

    • Hierarchical linear regressions to test moderation (Aiken & West, 1991 approach).

    • Moderation tested with interaction terms (N×TMX, M×TMX, P×TMX).

    • Simple slope analyses and figures for significant interactions; significance assessed with p-values and change in R-squared (DR2).

  • Key results

    • Direct DT–SL relations (H1a–H1c)

    • Narcissism–SL: r = 0.16, p < 0.05 (positive)

    • Machiavellianism–SL: r = 0.41, p < 0.01 (positive)

    • Psychopathy–SL: r = 0.61, p < 0.01 (positive)

    • All three DT traits positively related to SL, supporting H1a–H1c.

    • TMX moderation (H2a–H2c)

    • H2a (Narcissism × TMX): not significant (b = −0.14, n.s.)

    • H2b (Machiavellianism × TMX): significant (b = −0.28, p < 0.05)

      • Simple slope: high Machiavellianism, SL weaker when TMX is high; figure shows this moderation (Figure 1).

    • H2c (Psychopathy × TMX): significant (b = −0.25, p < 0.05)

      • Simple slope: high psychopathy, SL weaker when TMX is high; figure shows this moderation (Figure 2).

    • TMX–SL direct relation: significant negative correlation (r = −0.27, p < 0.01).

    • Overall pattern: TMX dampens DT trait–SL link for Machiavellianism and psychopathy, but not for Narcissism.

    • Regression and model fit (examples from Table 2)

    • Model 1–3 (main effects and controls): R² around 0.39–0.42.

    • Model 4–6 (add TMX and interactions for N): modest R² increases; significant interaction only for Machiavellianism × TMX in Model 6 (b = −0.28, p < 0.05).

    • Model 7–9 (for Psychopathy): interaction significant in Model 9 (b = −0.25, p < 0.05).

    • Change in R² (DR²) indicates meaningful incremental validity for some interaction terms (e.g., DR² ≈ 0.20 in one model where TMX×DT interaction entered).

    • Visuals

    • Figure 1: Moderating effect of TMX on the Machiavellianism–SL relationship (low vs. high Machiavellianism; low vs. high TMX).

    • Figure 2: Moderating effect of TMX on the Psychopathy–SL relationship (low vs. high Psychopathy; low vs. high TMX).

  • Interpretation and discussion

    • All three DT traits are positively associated with SL, consistent with expectations that socially aversive traits predispose loafing in teams.

    • TMX as a moderator appears to dampen the MTX–SL link for Machiavellianism and Psychopathy, implying that high-quality TMX reduces loafing tendencies for these individuals.

    • Narcissism–SL relation does not depend on TMX quality in this study, suggesting narcissists may loaf regardless of TMX, possibly because they value their own input and may loaf to match or exceed others’ effort (as prior non-workplace findings suggest when identification of effort is ambiguous).

    • The observed negative relation between TMX and SL aligns with prior research showing positive team relations reduce loafing; however, Murphy et al. (2003) reported null results, which this study revisits and partly revises.

    • Practical implications: managers may face higher monitoring costs when teams include members with DT traits if SL is a concern; fostering high-quality TMX (e.g., team-building activities that enhance cohesion) can help mitigate loafing for those with Machiavellian or psychopathic tendencies.

    • Theoretical contributions: integrates DT–SL and TMX literatures within a person X situation framework; supports Trait Activation Theory by showing trait-relevant behaviors activated under low TMX conditions and dampened under high TMX for certain DT traits.

  • Practical implications

    • Team formation and selection

    • Consider screening for elevated DT traits if SL is a concern and teams require high collaborative effort.

    • When DT traits are present, build high-quality TMX through team-building, structured collaboration tasks, and mechanisms to increase mutual accountability.

    • Team management and monitoring

    • Recognize that DT traits may increase monitoring costs, particularly for Machiavellianism and psychopathy; TMX improvement can mitigate some of these costs by reducing loafing.

    • Interventions

    • Use social-cohesion–building activities (e.g., cooperative tasks, personal introductions, role clarification) to enhance TMX and reduce SL in teams with at-risk individuals.

  • Limitations and future research directions

    • Limitations

    • Cross-sectional design: cannot infer causality.

    • Single-source data from focal employees; potential common method bias despite instructions to randomize items.

    • MTurk sample limits generalizability to broader organizational contexts.

    • All moderators tested: TMX only; other contextual factors (culture, team climate, organizational culture) not explored here.

    • Future research suggestions

    • Longitudinal or experimental designs to establish causal links between DT traits, TMX, and SL.

    • Multi-source data: supervisor or peer ratings of SL; cross-validate TMX measures across team members.

    • Include additional moderators (culture, team climate, leadership, organizational justice) and mediators (perceived accountability, cohesion).

    • Explore mediation models where SL mediates the link between DT traits and job performance or team outcomes.

    • Cross-cultural studies to examine cultural moderators of DT–SL and TMX effects, given prior evidence of cultural moderation in DT-related outcomes.

  • Connections to broader literatures

    • DT and deviant workplace behavior: builds on O’Boyle et al. (2012) meta-analysis linking DT traits to CWBs and performance outcomes; extends to the specific deviance of SL.

    • TMX research: aligns with Byun et al. (2020), Murphyc et al. (2003), and Seers (1989) on how social exchange quality affects individual behavior and performance.

    • SL literature: integrates with Karau & Williams (1993) meta-analytic work and Karau & Wilhau (2020) integrative review, highlighting the role of personality and situational factors in loafing.

    • Methodological stance: follows a person X situation framework and uses moderated regression to test interaction effects, consistent with Baron & Kenny (1986) and Aiken & West (1991).

  • Key numerical and statistical references (highlights)

    • Sample and measures

    • N = 223

    • DT: Short Dark Triad (SD3) – Narcissism, Machiavellianism, Psychopathy; αs: 0.77, 0.76, 0.77 respectively.

    • TMX: 10-item scale; α = 0.79.

    • Perceived SL: 10-item scale; α = 0.88.

    • Narcissism–SL correlation: r = 0.16, p < 0.05

    • Machiavellianism–SL correlation: r = 0.41, p < 0.01

    • Psychopathy–SL correlation: r = 0.61, p < 0.01

    • TMX–SL correlation: r = −0.27, p < 0.01

    • Moderation findings (unstandardized betas)

    • Narcissism × TMX: b = −0.14, n.s. (not supported)

    • Machiavellianism × TMX: b = −0.28, p < 0.05 (supported)

    • Psychopathy × TMX: b = −0.25, p < 0.05 (supported)

    • Regression model statistics (selected)

    • Model 1–3: R² ≈ 0.39–0.42

    • Model 6 (M × TMX): DR² ≈ 0.20 (substantial increment for the interaction)

    • Model 9 (P × TMX): R² ≈ 0.43

    • Theoretical references for methods and interpretation

    • Moderation testing approach (Aiken & West, 1991; Dawson, 2014)

    • Conceptual foundations of TMX (Seers, 1989; Seers et al., 1995)

  • Notable limitations of the study design and interpretation

    • Cross-sectional limits causal inferences; potential for reverse causality between SL and TMX.

    • Common method bias risk due to single-source self-reports; future work should include multi-source data and temporal separation.

    • MTurk sample may not fully generalize to all organizational settings or cultures.

  • Takeaways for exam-ready understanding

    • All three DT traits are positively related to self-reported social loafing in workplace teams.

    • TMX can weaken the link between Machiavellianism or psychopathy and SL, indicating social context can buffer the negative impact of certain DT traits on team effort.

    • Narcissism’s relation to SL appears robust to TMX quality in this study, suggesting different mechanisms (e.g., perceived identifiability of effort) may drive narcissistic loafing.

    • Practical implication: enhancing TMX quality is a viable lever to reduce loafing in teams, particularly when DT traits are present, but may not address narcissism-driven loafing.

  • Core takeaway quotations (for quick recall)

    • “TMX moderated the Machiavellianism-SL and psychopathy-SL relationships, as hypothesized.”

    • “TMX was not found to moderate the narcissism-SL relationship.”

    • “High-quality TMX relations among employees with elevated levels of trait Machiavellianism or psychopathy likely moderates the positive Machiavellianism- and psychopathy-SL relations.”

  • Summary equation (conceptual model)

    • ext{SL} = eta0 + eta1 ext{N} + eta2 ext{M} + eta3 ext{P} + eta4 ext{TMX} + eta5 ( ext{N} imes ext{TMX}) + eta6 ( ext{M} imes ext{TMX}) + eta7 ( ext{P} imes ext{TMX}) + ext{Controls} + oldsymbol{
      u}

  • Additional context and sources cited in the study

    • Foundational DT measures: Jones & Paulhus (2014); Paulhus & Williams (2002);

    • DT and CWBs meta-analytic work: O’Boyle et al. (2012);

    • TMX foundational work: Seers (1989); Seers, Petty & Cashman (1995);

    • SL foundational work: Latané, Williams & Harkins (1979); George (1992);

    • Social exchange theory and moderation in management research: Blau (1964); Baron & Kenny (1986); Aiken & West (1991); Dawson (2014).

  • Bottom line for exams

    • The study provides evidence that DT traits are linked to SL, and that TMX can attenuate this link for Machiavellianism and psychopathy, highlighting the importance of social context in moderating personality-driven workplace behaviors. Narcissism remains resistant to TMX’s moderating influence in this sample.