Introducing a bias correction function to determine the next odour to be presented

[vlkuzun]

One issue we have is the mice create a bias for an odour/lick port which hampers ability to reach criterion and value both odours equally for further experiments. One solution is to control the next odour which is presented against the lick port preference of the mouse. An example line of code from the IBL project which we could implement in our setup is:

def next_position(response_buffer): right_proportion = 0.5 right_responses = [int(x) for x in response_buffer if x == 1] right_proportion = sum(right_responses) / len(response_buffer) probRight = random.gauss(right_proportion, 0.5) if probRight < 0.5: position = 'left' else: position = 'right' return position

[vlkuzun]

This should only occur at stage when the mouse is no longer receiving alternating reward locations but is sampled randomly, so a new parameter such as enableBiasCorrection could be included to enable bias correction.

Also the bias should be determined by the first reward port entry following reward presentation as the mouse can make multiple reward port entries following odour sampling.