Note that in this study, the authors did not estimate the learning rate for each subject but instead used a fixed learning rate based on previous research for all subjects (∈ = 0.1, the results were alsostable when ∈ = 0.4). The former is known as ‘individual learning’whereas the latter is referred to as ‘fixed learning’ (Cohen, 2007;Chase et al., 2015). Whereas individual learning is better at accommodating subjects’ behaviors, fixed learning reduces noise and mayimprove reliability but at the expense of losing individual learningrate data