The effect refers to the outcome or result of a particular action, event, or condition. In the context of this question, it is the impact that sensorimotor activities have on cognitive development in toddlers.
This refers to the variable that is manipulated by researchers in an experiment. For example, in this scenario, it would be the specific sensorimotor activities being performed by toddlers.
The dependent variable is what researchers measure or observe to determine if there's any change or effect caused by the independent variable. In this case, it would be cognitive development in toddlers.
A control group is a group within an experiment that does not receive any treatment or intervention. It serves as a baseline for comparison with other groups receiving different treatments or interventions.