Psychophysiology, 2006, 43(3), 237-252. Stimuli and Randomization Sequence of WSPT

Appendix

Table 1 lists eight four-word sets of test and practice stimuli. These sets were randomly assigned to different Latin Squares, so that each of the four words within a set (1) occurred exactly once in each of the four positions in a stimulus sequence; and (2) was a probe once in each of the four sequences defined by the Latin Square. Table 2 lists the pseudo-randomized trial sequence used for all participants, in which any given four-word set was repeated after 8 trials using a different sequence.

Table 1. Four-word sets of test and practice stimuli (word frequency given by Thorndike and Lorge, 1944).
Set #	Test Stimuli
1	DUCK (49)	GOAT (50)	GOOSE (45)	WOLF (50)
2	CLOCK (50)	FORK (31)	SPOON (33)	STOOL (16)
3	BASKET (50)	CANDLE (43)	HAMMER (34)	PENCIL (40)
4	ALMOND (8)	CARROT (9)	MELON (5)	PEANUT (7)
5	BEACH (50)	CLOUD (100)	FIELD (100)	PLANT (100)
6	BOOT (37)	DRESS (100)	SHIRT (47)	SHOE (100)
7	BELL (50)	CARD (50)	DESK (50)	LOCK (50)
8	CAMEL (18)	EAGLE (38)	MONKEY (23)	TIGER (30)
	Practice Stimuli
9	ANKLE (21)	CHALK (13)	FLUTE (9)	JUICE (37)
10	ARM (100)	BOX (100)	DOG (100)	LEG (100)
11	OCEAN (100)	RECORD (100)	WAGON (50)	WINTER (100)
12	BREAD (50)	FENCE (50)	MATCH (50)	SKIRT (50)
13	FINGER (100)	MOUNTAIN (100)	TABLE (100)	WATER (100)
14	BARN (45)	BUSH (50)	DEER (35)	LAMP (50)
15	LETTER (100)	PAPER (100)	RIVER (100)	SHOULDER (100)
16	APPLE (50)	ENGINE (50)	FLOWER (100)	HOTEL (50)

Table 2. Pseudo-randomized trial sequence consisting of one 8-trial practice block and four 32-trial experimental blocks. Each trial consisted of an intial 4-word sequence, followed by a delay period and a probe word.
Trial	Word 1	Word 2	Word 3	Word 4	Probe Word	Correct

	Practice Block
-8	fence	skirt	match	bread	match	3
-7	table	mountain	finger	water	table	1
-6	deer	bush	barn	lamp	lamp	4
-5	river	letter	paper	shoulder	paper	3
-4	flower	engine	apple	hotel	engine	2
-3	chalk	flute	juice	ankle	chalk	1
-2	leg	box	arm	dog	arm	3
-1	winter	record	ocean	wagon	wagon	4

	Block #1
1	wolf	goose	goat	duck	duck	4
2	clock	stool	fork	spoon	stool	2
3	hammer	candle	pencil	basket	hammer	1
4	carrot	almond	peanut	melon	peanut	3
5	plant	beach	cloud	field	plant	1
6	dress	shoe	boot	shirt	shirt	4
7	bell	card	desk	lock	desk	3
8	tiger	monkey	camel	eagle	monkey	2
9	goose	duck	wolf	goat	goose	1
10	stool	spoon	clock	fork	clock	3
11	candle	basket	hammer	pencil	pencil	4
12	almond	melon	carrot	peanut	melon	2
13	beach	field	plant	cloud	cloud	4
14	shoe	shirt	dress	boot	shoe	1
15	card	lock	bell	desk	lock	2
16	monkey	eagle	tiger	camel	tiger	3
17	duck	goat	goose	wolf	wolf	4
18	spoon	fork	stool	clock	fork	2
19	basket	pencil	candle	hammer	basket	1
20	melon	peanut	almond	carrot	almond	3
21	field	cloud	beach	plant	field	1
22	shirt	boot	shoe	dress	dress	4
23	lock	desk	card	bell	card	3
24	eagle	camel	monkey	tiger	camel	2
25	goat	wolf	duck	goose	goat	1
26	fork	clock	spoon	stool	spoon	3
27	pencil	hammer	basket	candle	candle	4
28	peanut	carrot	melon	almond	carrot	2
29	cloud	plant	field	beach	beach	4
30	boot	dress	shirt	shoe	boot	1
31	desk	bell	lock	card	bell	2
32	camel	tiger	eagle	monkey	eagle	3

	Block #2
33	wolf	goose	goat	duck	goose	2
34	clock	stool	fork	spoon	clock	1
35	hammer	candle	pencil	basket	pencil	3
36	carrot	almond	peanut	melon	melon	4
37	plant	beach	cloud	field	cloud	3
38	dress	shoe	boot	shirt	shoe	2
39	bell	card	desk	lock	lock	4
40	tiger	monkey	camel	eagle	tiger	1
41	goose	duck	wolf	goat	goat	4
42	stool	spoon	clock	fork	spoon	2
43	candle	basket	hammer	pencil	candle	1
44	almond	melon	carrot	peanut	carrot	3
45	beach	field	plant	cloud	beach	1
46	shoe	shirt	dress	boot	boot	4
47	card	lock	bell	desk	bell	3
48	monkey	eagle	tiger	camel	eagle	2
49	duck	goat	goose	wolf	duck	1
50	spoon	fork	stool	clock	stool	3
51	basket	pencil	candle	hammer	hammer	4
52	melon	peanut	almond	carrot	peanut	2
53	field	cloud	beach	plant	plant	4
54	shirt	boot	shoe	dress	shirt	1
55	lock	desk	card	bell	desk	2
56	eagle	camel	monkey	tiger	monkey	3
57	goat	wolf	duck	goose	wolf	2
58	fork	clock	spoon	stool	fork	1
59	pencil	hammer	basket	candle	basket	3
60	peanut	carrot	melon	almond	almond	4
61	cloud	plant	field	beach	field	3
62	boot	dress	shirt	shoe	dress	2
63	desk	bell	lock	card	card	4
64	camel	tiger	eagle	monkey	camel	1

	Block #3
65	wolf	goose	goat	duck	goat	3
66	clock	stool	fork	spoon	spoon	4
67	hammer	candle	pencil	basket	candle	2
68	carrot	almond	peanut	melon	carrot	1
69	plant	beach	cloud	field	beach	2
70	dress	shoe	boot	shirt	boot	3
71	bell	card	desk	lock	bell	1
72	tiger	monkey	camel	eagle	eagle	4
73	goose	duck	wolf	goat	wolf	3
74	stool	spoon	clock	fork	fork	4
75	candle	basket	hammer	pencil	basket	2
76	almond	melon	carrot	peanut	almond	1
77	beach	field	plant	cloud	field	2
78	shoe	shirt	dress	boot	dress	3
79	card	lock	bell	desk	card	1
80	monkey	eagle	tiger	camel	camel	4
81	duck	goat	goose	wolf	goose	3
82	spoon	fork	stool	clock	clock	4
83	basket	pencil	candle	hammer	pencil	2
84	melon	peanut	almond	carrot	melon	1
85	field	cloud	beach	plant	cloud	2
86	shirt	boot	shoe	dress	shoe	3
87	lock	desk	card	bell	lock	1
88	eagle	camel	monkey	tiger	tiger	4
89	goat	wolf	duck	goose	duck	3
90	fork	clock	spoon	stool	stool	4
91	pencil	hammer	basket	candle	hammer	2
92	peanut	carrot	melon	almond	peanut	1
93	cloud	plant	field	beach	plant	2
94	boot	dress	shirt	shoe	shirt	3
95	desk	bell	lock	card	desk	1
96	camel	tiger	eagle	monkey	monkey	4

	Block #4
97	wolf	goose	goat	duck	wolf	1
98	clock	stool	fork	spoon	fork	3
99	hammer	candle	pencil	basket	basket	4
100	carrot	almond	peanut	melon	almond	2
101	plant	beach	cloud	field	field	4
102	dress	shoe	boot	shirt	dress	1
103	bell	card	desk	lock	card	2
104	tiger	monkey	camel	eagle	camel	3
105	goose	duck	wolf	goat	duck	2
106	stool	spoon	clock	fork	stool	1
107	candle	basket	hammer	pencil	hammer	3
108	almond	melon	carrot	peanut	peanut	4
109	beach	field	plant	cloud	plant	3
110	shoe	shirt	dress	boot	shirt	2
111	card	lock	bell	desk	desk	4
112	monkey	eagle	tiger	camel	monkey	1
113	duck	goat	goose	wolf	goat	2
114	spoon	fork	stool	clock	spoon	1
115	basket	pencil	candle	hammer	candle	3
116	melon	peanut	almond	carrot	carrot	4
117	field	cloud	beach	plant	beach	3
118	shirt	boot	shoe	dress	boot	2
119	lock	desk	card	bell	bell	4
120	eagle	camel	monkey	tiger	eagle	1
121	goat	wolf	duck	goose	goose	4
122	fork	clock	spoon	stool	clock	2
123	pencil	hammer	basket	candle	pencil	1
124	peanut	carrot	melon	almond	melon	3
125	cloud	plant	field	beach	cloud	1
126	boot	dress	shirt	shoe	shoe	4
127	desk	bell	lock	card	lock	3
128	camel	tiger	eagle	monkey	tiger	2