Maturation is a threat to internal validity stemming from either long-term or short-term physiological changes occurring within the participants that may influence the dependent variable.
<h3>
What are physiological changes?</h3>
Ageing causes physiological changes in all organ systems. Arteriosclerosis develops, blood pressure rises, and cardiac output declines. Lung function is compromised, vital capacity is reduced, and expiratory flow rates are slowed.
Pregnancy causes a number of physiological changes in the mother, such as an increase in fat and total body water, a drop in plasma protein concentrations, particularly albumin, an increase in blood volume, cardiac output, and blood flow to the kidneys, and a decrease in blood pressure.
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The factors with the most improvement as shown on the test were:
- Having a professional job
- more education
- people who do not to drugs
<h3>What is an intelligence test?</h3>
This is a test that is carried out on human beings in order to determine their intelligence quotients.
These tests are carried out on people to get where they fall in terms of their ability to reason and carry out tasks.
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The cephalocaudal pattern is the sequence in which the earliest growth always occurs at the: Top-the head-with physical growth in size, weight, and feature differentiation gradually working from top to bottom.
<h3>What is cephalocaudal pattern:</h3>
Cephalocaudal pattern is simply a development pattern in which growth begin or start from head to toe or from top to bottom.
The word cephalocaudal come from or is generated from cephalo which means head and caudal which means toe.
We can therefore say that cephalocaudal pattern is a growth pattern that start from the head which is the uppermost of the body, before moving down or proceeding to the following:
Inconclusion the cephalocaudal pattern is the sequence in which the earliest growth always occurs at the: Top-the head.
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