Age-graded influences are mostly unpredictable.

Age-graded influences refer to the effects that certain events or experiences have on individuals based on their age. These influences are predictable to some extent because they are based on developmental expectations and milestones. For example, it is expected that a child will learn to walk by a certain age, and that an adolescent will experience changes in mood due to hormonal changes. However, there can still be variability in how individuals respond to these age-graded influences.