10.85. Three-dimensional intradimensional/extradimensional set-shifting task (IDED3D)

10.85.1. Source

From Rogers RD et al. (1999), Psychopharmacology 146: 482, PMID https://www.pubmed.gov/10550499.

10.85.2. Intellectual property rights

• De novo task code; part of the CamCOPS intellectual property.

• Some stimuli redrawn from original task (by RD Rogers, University of Cambridge, 1995-1999).

10.85.3. Counterbalancing

The counterbalancing options are:

• Counterbalancing 0: dimensions shape, colour, number

• Counterbalancing 1: dimensions colour, number, shape

• Counterbalancing 2: dimensions number, shape, colour

• Counterbalancing 3: dimensions shape, number, colour

• Counterbalancing 4: dimensions colour, shape, number

• Counterbalancing 5: dimensions number, colour, shape

Python code equivalent to the actual code used in IDED3D::makeStages():

poss_dimensions = ["shape", "colour", "number"]
# ... from Exemplars::possibleDimensions()
n_dimensions = len(poss_dimensions)
for cb_dim in range(0, 5 + 1):
    cb1max = n_dimensions
    cb2max = n_dimensions - 1
    cb1 = cb_dim % cb1max
    cb2 = (cb_dim // cb1max) % cb2max
    first_dim_index = cb1
    second_dim_index = (first_dim_index + 1 + cb2) % n_dimensions
    third_dim_index = (first_dim_index + 1 + (cb2max - 1 - cb2)) % n_dimensions
    print(
        f"Counterbalancing {cb_dim}: dimensions "
        f"{poss_dimensions[first_dim_index]}, "
        f"{poss_dimensions[second_dim_index]}, "
        f"{poss_dimensions[third_dim_index]}"
    )