The type of study that generally does not follow the scientific method and typically contains many confounds is the

The options are

a. case study.

b. true experiment.

c. correlation model.

d. longitudinal study.

The answer is a. Case study

The type of study that generally does not follow the scientific method and typically contains many confounds is the CASE STUDY.

The study involves mostly the use of a subject with a non detailed data and is often used in the aspect of comparison with other studies.

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productive most commonly means: achieving or producing a significant amount or result.

explanation:

productive can also mean:

these depend on how the word productive is used. most likely productive will mean   achieving or producing a significant amount or result.