Sparse Spectro-Temporal Receptive Fields Based on Multi-Unit and High-Gamma Responses in Human Auditory Cortex
Fig 4
Discovery-based selection of lambda (λ).
Discovery-selection by permutation of the response r(t) to identify the minimum lambda necessary to reduce the degrees of freedom to zero. Empirical distribution shows the histogram of minimum λ over 200 repeated permutations and serves as the null distribution. The red arrow denotes the median of the distribution that we designate as the optimal λ.