My thoughts on “grandma’s advice” is that it should not automatically be dismissed as it does have some basis of experience and what was known in society during their generation. Although, overtime information does seem to change, but no matter the change, sometimes good old fashioned cultural remedies can do just fine.
Research: Why is it important to utilize developmental theory to explain children's development?
The most important reason we should utilize developmental theories to explain children’s development is, because theories are the cornerstone for you find or developing the techniques that fits your specific situation. Having a generalized idea will help guide you as you continue to do further research. Everything