“…Environment may complicate this relationship; as in the step count example, local terrain or topography could be markedly different than the validated standard (Huang et al, 2016). Other constructs are the result of more complex physiological measurements (e.g., accelerometer data to gauge movement and intensity), and still others aim to represent psychological or social constructs (e.g., excitement, fear, stress) (Pykett et al, 2020). While these measures may have a biological basis derived from laboratory settings, important questions emerge about the validity of these measures when used in the field, especially measures that indicate response to external stimuli (Chrisinger and King, 2018;Pykett et al, 2020).…”