Research suggests that tall individuals have an advantage over short individuals in terms of status, prestige, and leadership, though it is not clear why. Applying an evolutionary psychology perspective, we predicted that taller individuals are seen as more leader-like because they are perceived as more dominant, healthy, and intelligent. Being fit and physically imposing were arguably important leadership qualities in ancestral human environments—perhaps especially for males—where being a leader entailed considerable physical risks. In line with our expectations, our results demonstrate that by manipulating an individual’s stature height positively influences leadership perception for both men and women, though the effect is stronger for men. For male leaders this height leadership advantage is mediated by their perceived dominance, health, and intelligence; while for female leaders this effect is only mediated by perceived intelligence.

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PurposeDrawing on the dynamic model of ability, motivation, opportunity (AMO) for human resource research, this study aims to examine how organizational system-level (i.e. the high-performance work system (HPWS)) and individual-level AMO affect employees' performance. Specifically, this paper proposes that employee task performance is resultant from the integration of system- and individual-level AMO factors with employee contextual performance.Design/methodology/approachA survey design is employed with data collected from 250 employees working in New Zealand's service sector.FindingsThis study finds both organizational system (HPWS) and individual AMO dimensions have positive associations with employees' performance. At the system level, the supportive role played by contextual performance is highlighted with pro-social behaviors fully mediating the relationship between the HPWS and task performance. At the individual level, contextual performance is found to partially mediate the relationship between ability and task performance and fully mediate the relationship between motivation and task performance. Opportunity, on the other hand, is significantly associated with task but not contextual performance.Originality/valueIn acknowledging there are a plurality of factors that impact performance, this study enriches our understanding of AMO's influence in the context of people management.

PurposeFor some years, human resource management (HRM) scholars have sought to understand how the high performance work system (HPWS) impacts performance. Recently, attention has turned to developing knowledge about the more micro-level aspects of this relationship, with the ability–motivation–opportunity (AMO) framework providing a useful lens. Empirically, these studies have produced mixed results. This study explores whether context is useful in explaining these anomalous findings.Design/methodology/approachThis study considered the effects of context across two levels – the descriptive (situated demography–gender) and the analytical (societal–national culture) – on employees' behaviour in the HPWS–job performance relationship using survey data obtained from a sample of New Zealand organisations.FindingsResults indicate that the employee demographic of gender may play an influential role, with ability found to be the most significant predictor of job performance for males and opportunity the strongest predictor of job performance for females. Given the importance of cultural context when examining employees' gendered behaviours, this study also considers the influence of New Zealand's national culture.Practical implicationsBy describing the interaction between trait expressive work behaviours and job features, this study dispels the myth of universalism. In line with a contingency view, practitioners are encouraged to ensure alignment between features of their organisational context and the behavioural outcomes sought from their HPWS.Originality/valueThis study suggests HPWS research designs would benefit from analysing the full effects of contextual variables, rather than considering them purely as controls.