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+ EXPERIMENTAL INVESTIGATIONS An experimental investigation is one in which a control is identified. The variables are measured in an effort to gather.

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Presentation on theme: "+ EXPERIMENTAL INVESTIGATIONS An experimental investigation is one in which a control is identified. The variables are measured in an effort to gather."— Presentation transcript:

1 + EXPERIMENTAL INVESTIGATIONS An experimental investigation is one in which a control is identified. The variables are measured in an effort to gather evidence to support or not support a causal relationship. This is often called a controlled experiment.

2 + DESCRIPTIVE INVESTIGATIONS Descriptive investigations involve collecting qualitative and/or quantitative data to draw conclusions. It includes a question, but no hypothesis. Observations are recorded, but no comparisons are made and no variables are manipulated.

3 + COMPARATIVE INVESTIGATIONS Comparative investigations involve collecting data to make comparisons. The hypothesis identifies one independent (manipulated) and one dependent (responding) variable, and a fair test is designed to determine the relationship between them.

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