Supplemental Material


Return to main supplement page

Individual observer's data: IEA (Experiment 2B)


For each set, the tables below provide the CIELAB and xyY values for the inferred matches derived via our analysis in Experiment 2A.
For each target and condition, these values correspond to the competitor sample that was included in the customized competiotor set for this subject.

Inferred matches (based on finalized analysis)  (Set A, Set B)
Preliminary inferred matches (presented in the experiment) (Set A, Set B)
Data tables follow this format:
Column 1: Condition code (NC for illuminant-constant; CY for yellowish illuminant-change, CB for bluish illuminant-change).
Column 2: Target number (T1: "Gray" in Set A, "Corn" in Set B;
T2: "Rose" in Set A, "Skin" in Set B; T3: "Teal" in Set A, "Lettuce" in Set B; T4: "Green" in Set A, "Bark" in Set B).
Columns 3-5: xyY values of the inferred match.
Columns 6-8: CIELAB values of the inferred match.

The tables below provide individual observer data for the blocks task, as tab delimited text.
For each set, we provide one data file for all conditions (illumination-constant and illuminant-changed combined).

Block selection data (Set A, Set B)
Data tables follow this format: 
Column 1: Condition code (NC for illuminant-constant; CY for yellowish illuminant-change, CB for bluish illuminant-change).
Column 2: Block number
Column 3: Trial type (denoted as a unique integer; refers to a specific combination of target, competitor pair and illumination condition)
Column 4: Target 1,
SetA: "Gray", Set B: "Corn": first competitor in the competitor pair on a given trial  (Convention for illumination-constant condition: 1= C-2, 2 =  C-1; 3 = T; 4 = C+1; 5 = C+2; 6 = Subject's inferred match). For illumination-changed condition 1= T, 2 = C1; 3 = C2; 4 = C3; 5 = R; 6 = C5; 7 = Subject's inferred match).
Column 5: Target 1, SetA: "Gray", Set B: "Corn": second competitor in the competitor pair on a given trial (same convention as in Column 4).
Column 6: Target 1, SetA: "Gray", Set B: "Corn": competitor chosen by the subject on a given trial (1 = the first competitor in a pair, 2 = the second competitor in a pair).
Column 7: Target 2,  SetA: "Rose", Set B: "Skin": first competitor in the competitor pair on a given trial  (same convention as in Column 4).
Column 8: Target 2,  SetA: "Rose", Set B: "Skin": second competitor in the competitor pair on a given trial (same convention as in Column 4).
Column 9: Target 2,  SetA: "Rose", Set B: "Skin": competitor chosen by the subject on a given trial (1 = the first competitor in a pair, 2 = the second competitor in a pair).
Column 10: Target 3,  SetA: "Teal", Set B: "Lettuce": first competitor in the competitor pair on a given trial  (same convention as in Column 4).
Column 11: Target 3,  SetA: "Teal", Set B: "Lettuce": second competitor in the competitor pair on a given trial (same convention as in Column 4).
Column 12: Target 3,  SetA: "Teal", Set B: "Lettuce": competitor chosen by the subject on a given trial (1 = the first competitor in a pair, 2 = the second competitor in a pair).
Column 13: Target 4,  SetA: "Green", Set B: "Bark": first competitor in the competitor pair on a given trial  (same convention as in Column 4).
Column 14: Target 4,  SetA: "Green", Set B: "Bark": second competitor in the competitor pair on a given trial (same convention as in Column 4).
Column 15: Target 4,  SetA: "Green", Set B: "Bark": competitor chosen by the subject on a given trial (1 = the first competitor in a pair, 2 = the second competitor in a pair).
Column 16: Reaction time in seconds (from the trial onset until the subject made a choice).
Column 17: Session order number.
Note: NaN value for competitor chosen (in Columns 6, 9, 12 or 15) indicates that no block from the source was assigned to this target block (and the corresponding block in the workspace remained black) or that the block that was assigned was not one of the two competitors for this target (and was thus excluded from the analysis).