Table 4 Internal consistency indices for the Volunteer Functions Inventory (VFI) and Theory of Planned Behaviour (TPB) factors using Cronbach’s Alpha, McDonald’s Omega, and Greatest Lower Bound (GLB).

From: Assessing scale reliability in citizen science motivational research: lessons learned from two case studies in Uganda

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  1. Colour shading represents ranges of values from minimum (dark red) to acceptable values of 0.7 (dark green).
  2. Alpha raw=alpha with original data, Alpha_Log= alpha when data was log-transformed, Alpha_Inverse =alpha when data was inverse-transformed and PBC is Perceived Behavioural Control.
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