Table 5. ARITHMETIC TRANSFORMATIONS.

Visual tracking, Violation of Expectation Procedure

Study	Age	Transformation Tested	Longer looking for Unexpected Number Transformation?	Continuous Variables Controlled?	Longer Looking for Unexpected Area Transformation?
Wynn (1992)	4-5 mos	1+1	Yes	No	Yes
Wynn (1992)	4-5 mos	2-1	Yes	No	Yes
Simon, Hespos, & Rochat (1995)	3-5 mos	1+1	Yes	No	Yes
Simon, Hespos, & Rochat (1995)	3-5 mos	2-1	Yes	No	Yes
Feigenson, Carey, & Spelke (2002), Experiements 6 & 7	6-7 mos	1+1	No	Yes	Yes
Feigenson, Carey, & Spelke (2002), Experiements 6 & 7	6-7 mos	2-1	No	Yes	Yes
Uller, Carey, Huntley-Fenner, & Klatt (1999)	8 and 10 mos	1+1	Yes	No	Yes
McCrink & Wynn (2004)	8-9 month olds	5+10	Yes	Yes	NA
McCrink & Wynn (2004)	8-9 month olds	10-5	Yes	Yes	NA
Gao, Levine, & Huttenlocher (2000)	6-7 mos	¼ + ½ = ¾	NA	NA	Yes

This table is list of relevant studies investigating infants’ capacities to respond to transformations of quantity. Stimuli used for most of the studies in this list were three-dimensional dolls. One study (Gao, Levine, & Huttenlocher, 2000) investigated continuous quantity transformation and used liquid in a container as the stimuli. The transformation tested is in Column 3. Column 4 indicates whether infants looked longer at the unexpected outcome to the transformation (for example, looked longer to a scenario of 1+1=1). For the one study investigating continuous quantity transformations, the relevant information for discrimination is in Column 6.