Final answer:
Lamarre and Holland (1985) demonstrated response differentiation by showing that children aged 3-5 under extinction conditions did not show evidence of manding if they received tact training and vice versa.
Step-by-step explanation:
In the context of the question, Lamarre and Holland (1985) demonstrated response differentiation by showing that children aged 3-5 under extinction conditions did not show evidence of manding if they received tact training and vice versa. Response differentiation refers to the ability to respond differently to similar stimuli. In this case, the children were able to differentiate between manding (requesting) and tact training (labeling objects or events).