1 RTFIT DATA set up for one problem
7 7 7 Rows and 7 columns
0 0 0 0 0 0 0 This is the 7 X 7 Matrix of
1.82 0 0 0 0 0 0 Judged "differences" in likeableness
3.82 2.73 0 0 0 0 0 Experimental design was triangular
4.67 3.95 2.53 0 0 0 0 All nonequal pairs.
6.65 5.50 4.07 3.35 0 0 0 Data are mean judgments from
8.13 7.05 5.67 4.47 2.53 0 0 Experiment 1 of Birnbaum & Jou (1990).
8.92 7.75 6.02 5.22 3.18 1.37 0
0 0 0 0 0 0 0 This is the 7 X 7 Matrix of
2084 0 0 0 0 0 0 "More" Choice RTs; i.e., "which
1989 3088 0 0 0 0 0 do you like MORE?"
1742 2315 3597 0 0 0 0
1649 1977 2396 3071 0 0 0
1583 1546 1702 1848 1923 0 0
1497 1538 1535 1558 1681 1736 0
0 0 0 0 0 0 0 This is the 7 X 7 Matrix of
1534 0 0 0 0 0 0 "Less" RTS; i.e., "which do you
1413 2078 0 0 0 0 0 like LESS?"
1264 1771 2933 0 0 0 0
1281 1673 2459 2995 0 0 0
1392 1772 2085 1953 2319 0 0
1312 1539 1813 1943 2095 2276 0
0 0 0 0 0 0 0 This is the 7 X 7 Matrix of weights
1 0 0 0 0 0 0 Cells that are not used in the design
1 1 0 0 0 0 0 Are set to zero, all other cells
1 1 1 0 0 0 0 get equal weight; i.e., weight of 1.
1 1 1 1 0 0 0 Below are initial estimates of the
1 1 1 1 1 0 0 parameters. Last are the Masks.
1 1 1 1 1 1 0
2.00 3.00 4.00 5.00 6.00 7.0 -1.0 1.0 1500.00
1500.00 8.0 16.00 45.00 60.00 60.0 43.0 17.0 30.0
30.0 56.0 46.0 60.00 19.0 1.0
1 0 0 0 0 0 0 0 0
0 0 0 0 0 0 0 0 0
0 0 0 0 0 0
A Mask of zero means that the parameter is free. A mask of 1 means that the
parameter is fixed to its initial value. The first scale value is always
fixed to one within the program.
The above set-up also fixes the second scale value, which
fixes the unit of the scale. S(1) = 1, S(2) = 2.
Parameters are as follows:
S(2) S(3) ... S(7) scale values for stimuli 2 through 7
AD = multiplicative constant for "difference" judgments AD(S(J)-S(I)) + BD
BD = additive constant for "difference" judgments
BR = additive constant for "less" RTs here set to 1.5 sec (1500 msec)
BRM = additive constant for "more" RTs here set to 1.5 sec
TR(1) TR(2) TR(3) ... TR(7) = bias parameters for "less" RTs
TRM(1) TRM(2) ... TRM(7) = bias parameters for "more" RTs.