Final answer:
The false statement is that to potty train successfully, a child must only be cognitively and physically ready.
Step-by-step explanation:
The false statement among the given options is: To potty train successfully, a child must only be cognitively and physically ready. All of the other statements are true. Preschoolers cannot be expected to sit still for long periods in church or school because they are still developing their ability to stay focused and regulate their behavior.
Being tolerant of mistakes and accidents is important for promoting independence and self-confidence in children. The willingness to work hard as a child is a stronger predictor of success as an adult than family background or intelligence.