Our data collection on subject difficulties with understanding or completing the preference instruments was sparse, limiting our analysis of testing difficulties.
Poor performance in experiment 1 may have been related to subjects' difficulty in inhibiting the prepotent response to act on the reward immediately.
However, an alternative possibility, namely, that AC subjects' difficulty with the task stemmed to some extent from the sequential handling of sensorimotor information, cannot be fully excluded.
Interference scores quantify subjects' difficulty in the task, with higher scores indicating greater difficulty.
Undergraduate biology students also have trouble with randomization of treatments (difficulty IVC) and the idea of having a representative sample of experimental subjects (difficulty IVB; Gormally et al., 2012).
Possible reasons may be due to methods, age of subjects, difficulty in making a clinical diagnosis of rotator cuff tendinopathy[ 64- 66] and possibly differences between upper and lower limb tendon loading behaviour and pathology in different populations.
Few undergraduate students know that random assignment of treatments to samples of experimental subjects (difficulty IVC) provides a way to measure and minimize the effect of natural variation in samples (Hiebert, 2007).
These goals align with some of the Table 1 difficulties, because groups of experimental subjects to be tested should be considered based on a variable property appropriate for the goal of an investigation (difficulty I), and a treatment was to be applied to groups of birds as experimental subjects (difficulty II, C and F).
But it is a film that sees its subjects' difficulties with eyes that are mostly clear and sincerely sympathetic a concerned, compassionate gaze represented on screen by that of the excellent Ms Weaver.
Yet comparing like for like is almost impossible and could just reflect the intake of students, rather than the subject's difficulty.
