Experimental Method

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 Experimental Method

The experimental method is a scientific method used to study cause-and-effect relationships by deliberately changing one variable and observing its effect on another under controlled conditions.

In simple form:

Cause → Effect

or

Independent Variable → Dependent Variable

Example

A researcher wants to know:

Does activity-based teaching improve achievement in Social Science?

Two groups may be formed:

Experimental group → Activity-based teaching

Control group → Traditional teaching

After instruction:

Achievement scores → Compared

Characteristic Features

  • Systematic and scientific.
  • Involves controlled conditions.
  • Studies cause-and-effect relationships.
  • Uses measurable variables.
  • Usually involves comparison.
  • Results can often be replicated.
  • Data are collected objectively.

Important terms

Independent Variable: Factor deliberately changed.

Dependent Variable: Factor whose change is measured.

Control Group: Group receiving the usual or comparison condition.

Experimental Group: Group receiving the intervention being studied.

Significance

The experimental method helps educational psychologists determine whether a particular educational practice actually produces an effect.

It can be used to study:

  • Teaching methods
  • Learning techniques
  • Reinforcement
  • Memory
  • Motivation
  • Classroom environment
  • Educational technology
  • Study habits

How to Adopt in Classroom Situations

Suppose a teacher wants to determine whether concept mapping improves students' understanding of a History unit.

Procedure

Step 1: Select students.

Step 2: Divide them into comparable groups.

Step 3: Teach one group using concept maps.

Step 4: Teach the comparison group using the usual method.

Step 5: Give the same achievement test.

Step 6: Compare the results.

Step 7: Draw a conclusion.

If the concept-map group performs better, the teacher has evidence that concept mapping may have contributed to improved achievement, while recognising that other factors may also matter.

Advantages

  1. Helps establish cause-and-effect relationships.
  2. More objective than purely subjective methods.
  3. Variables can be controlled.
  4. Results can be measured quantitatively.
  5. Can be repeated for verification.
  6. Useful for testing educational innovations.

Limitations

  1. Complete control is difficult in real classrooms.
  2. Artificial experimental conditions may not represent everyday learning.
  3. Ethical considerations may limit some experiments.
  4. Human behaviour is complex and influenced by many variables.
  5. Experiments can require considerable time and resources.
  6. Findings from one group may not apply universally.

Conclusion

The experimental method is one of the most scientific methods used in educational psychology. It helps educators examine cause-and-effect relationships and evaluate teaching and learning strategies. Although classroom conditions cannot always be completely controlled, carefully designed experiments can provide valuable evidence for improving educational practice.

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