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 Dominican Republic is geographically diverse for its size, having extensive beaches of white sand, evergreen forests in the highlands, fertile valleys with exuberant vegetation, and even desert zones with dune formations. Its mineral resources include nickel, bauxite, gold and silver.
Dr Freud said;
"It appears to be very obvious to me that you are experiencing Disney spells but at least you're not Goofy!
"
This is both a figure of speech, and a little play with character names. Disney Studios are the proprietors of both the Mickey Mouse and Donald Duck characters, and Disney may sound somewhat like Dizzy; rather than saying "dizzy spells", the specialist proposes it's "Disney spells"; Goofy is yet a third Disney character.
The doctrine that indicates especially naturalistic or non-theistic philosophy with positive emphasis on human values is secular ethics.
<h3>What is ethics?</h3>
Ethics simply mean the ability to know what's right from what's wrong in society.
In this case, the doctrine that indicates especially naturalistic or non-theistic philosophy with positive emphasis on human values is secular ethics.
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