All of the following are true of Vygotsky's concept of psychological tools except
a. only cultural symbols have potential for self-regulation of cognition.
b. signs and symbols are automatically psychological tools.
c. the major role is to facilitate one's thinking.
d. they are the products of one's own culture.
Question 2
The use of arbitrary stimuli changes the nature of thinking.
Indicate whether the statement is true or false
