Which kind of investigations allow for the control of variables?
Answer Expert Verified An experimental investigation allows you to control the variables. Explanation: Experimental investigations include a method in which a “fair test” is created and variables are actively planned, managed, and measured in an attempt to gather testimony to confirm or negate a causal relationship.
What are the steps in scientific investigation?
The scientific method has five basic steps, plus one feedback step:
- Make an observation.
- Ask a question.
- Form a hypothesis, or testable explanation.
- Make a prediction based on the hypothesis.
- Test the prediction.
- Iterate: use the results to make new hypotheses or predictions.
What are the components of an experimental procedure?
True experiments have four elements: manipulation, control , random assignment, and random selection. The most important of these elements are manipulation and control. Manipulation means that something is purposefully changed by the researcher in the environment.
What is an example of experimental method?
Participants are randomly allocated to each independent variable group. An example is Milgram’s experiment on obedience or Loftus and Palmer’s car crash study. Strength: It is easier to replicate (i.e. copy) a laboratory experiment. This is because a standardized procedure is used.
What is an example of experimental psychology?
For example, researchers could perform a study to look at whether sleep deprivation impairs performance on a driving test. The experimenter could control for other variables that might influence the outcome, but then vary the amount of sleep that participants get the night before a driving test.
What are the two fundamental features of an experimental research?
Experiments have two fundamental features. The first is that the researchers manipulate, or systematically vary, the level of the independent variable. The different levels of the independent variable are called conditions .