Dr. Okawa is interested in studying the effect that neurological trauma can have on short-term memory. Firstly, he collects detailed information from a small number of individuals who have experienced brain damage. Using information provided by medical records, interviews, and observations, he attempts to create an in-depth portrait of each individual. What type of research method was used in this study

case study

Explanation:

A case study is defined as a process or a method of research where a detailed information or a detailed study is done on a person or a population over a period of time. It is an in-depth thorough study done on the subject of interest to come to conclusion within the real world context.

In the context, Dr. Okawa first collects the data or information form a small number of individuals suffering from brain damage and then creates a in-depth study on the information provided by the interviews conducted or the from the medical records.

Thus, Dr. Okawa uses case study as a research method for this study.

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for many centuries there were important factors which the economies of the muslim empires developed increasingly. they applied economic procedures in production, investment, finance, taxation and property. they used to tax certain goods (for example: harvest), they charged interest on money lent, they signed contracts with merchants; they relied on a common currency, and they used checks as well as promissory notes. with the money collected by means of taxation, the government provided the needy with an income. in addition, trading networks covered huge distances, so far regions started to have contact and exchange goods. this trade network covered areas of asia, africa and europe.