Why Psychology Will Never Be a Science (University Lecture)
Channel: Prof. Sam Vaknin
Date: 2020-12-30

The important elements of testability, verifiability, refutability, falsifiability, and repeatability – are all largely missing from psychological theories and plots. No experiment could be designed to test the statements within the plot, to establish their truth-value and, thus, to convert them to theorems or hypotheses in a theory.

There are four reasons to account for this inability to test and prove (or falsify) psychological theories:

1. Ethical – Experiments would have to be conducted, involving the patient and others. To achieve the necessary result, the subjects will have to be ignorant of the reasons for the experiments and their aims. Sometimes even the very performance of an experiment will have to remain a secret (double blind experiments). Some experiments may involve unpleasant or even traumatic experiences. This is ethically unacceptable.

2. The Psychological Uncertainty Principle – The initial state of a human subject in an experiment is usually fully established. But both treatment and experimentation influence the subject and render this knowledge irrelevant. The very processes of measurement and observation influence the human subject and transform him or her - as do life's circumstances and vicissitudes.

3. Uniqueness – Psychological experiments are, therefore, bound to be unique, unrepeatable, cannot be replicated elsewhere and at other times even when they are conducted with the SAME subjects. This is because the subjects are never the same due to the aforementioned psychological uncertainty principle. Repeating the experiments with other subjects adversely affects the scientific value of the results.

4. The undergeneration of testable hypotheses – Psychology does not generate a sufficient number of hypotheses, which can be subjected to scientific testing. This has to do with the fabulous (=storytelling) nature of psychology. In a way, psychology has affinity with some private languages. It is a form of art and, as such, is self-sufficient and self-contained. If structural, internal constraints are met – a statement is deemed true even if it does not satisfy external scientific requirements.

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