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Two theoretical issues that developmental scientists differ is cognitive and emotional. A child would not have the same mindset as a 60 year old and vice versa. Also, a 2 year old would not be as emotional as an 22 year old but that's where it is kind of indecisive.

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Theories are a thorough or brief explanation of proven results or studies and they're also an explanation of what is to come in the near future. Therefore they set the groundwork and foundation for present and future scientists and also gives an prediction of what's to come

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4. What are two (2) theoretical issues on which developmental scientists differ? 

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4. What are two (2) theoretical issues on which developmental scientists differ? 

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Some ethical problems that might arise in a research with humans are the environment/location at which the research is taken place at. Others would be the human themselves, their age, background and whether or not the participant can understand the research.

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2. What ethical problems may arise in research with humans? 

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2. What ethical problems may arise in research with humans? 

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Developmental scientists  study people by use experimental, correlational and research. Some advantages of both correlational and experimental research would be the fact that you can see how the nature impacts a person and you can use dependent and dependent variables. Whereas, correlational only looks at the physical impacts on the subject and experimental only deals with the causes and effects.

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1. How do developmental scientists study people? What are some advantages and disadvantages of each research method? 

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1. How do developmental scientists study people? What are some advantages and disadvantages of each research method? 