The psychology of ageing

Three primary reflexes are described by Piaget: Over the first six weeks of life, these reflexes begin to become voluntary actions; for example, the palmar reflex becomes intentional grasping.

The psychology of ageing

The following tasks also explain the different types of conservation. Piaget proposed that children's inability to conserve is due to weakness in the way children think during the preoperational stage ages 2—6.

This stage of cognitive development is characterized by children focusing on a single, salient dimension of height or length, while ignoring other important dimensions about a situation. A child that cannot conserve would assume the taller glass has more liquid than the shorter glass.

Then liquid from the second glass A2 was poured into two taller, thinner glasses B1 and B2. The child was then asked whether there was still the same amount of liquid in both the new glasses B1 and B2 as in the first glass A2.

A child who cannot conserve would answer "no, there is more in the tall thin glasses," while a child who can conserve would answer "yes, there is still the same amount. These marbles are placed into two parallel lines that are the same length. Then the researcher spreads out the marbles in one line, to make it longer than the other.

Lastly the researcher asks "Is there the same number or a different number in both lines of marbles? Solid quantity[ edit ] For conservation of solid quantity, the task designed to assess children involves two lumps of clay. The researcher first rolls the two lumps into the same shape.

Then the researcher stretches out one of the balls into a long oblong shape. The researcher asks the child whether the two clay shapes have the same amount of clay or a different amount. A child that cannot conserve will answer that the shapes have different amounts of clay—that the oblong shape has more.

The child that can conserve will understand that they still both have the same amount of clay. The experimenter places two equal balls of clay onto either side of a balance and shows that the weights are the same.

Piaget's theory of cognitive development | Psychology Wiki | FANDOM powered by Wikia

The experimenter then molds one ball of clay into an oblong shape, and asks the child if the two pieces of clay will still weigh the same amount. A child that cannot conserve will answer that they now weigh a different amount, while a child that can conserve will recognize that shape does not affect weight and respond that they weigh the same amount.

Also age can vary across different countries see conservation across cultures. However most children are not able to perform the conservation of number task correctly from ages 4—5, and most children develop the ability from ages 6—8.

Conservation of mass and length occurs around age 7, conservation of weight around age 9, and conservation of volume around In the first stage, children do not yet have the ability to conserve.

During the conservation of liquid task, children will respond that a liquid in a tall glass always has more liquid than that of a short glass; they cannot discern height from amount. In the second stage, children expand their judgments in the conservation of liquid task to also include width as a reason; they may answers that a shorter, stouter glass has more liquid than a tall, skinny glass.

In the third stage, children have gained the ability to conserve, and recognize that height and width do not affect amount. For nonconserving children, research indicates that teachers should engage with children and ask them questions often about objects in their surrounds to encourage the development of more logical thinking.

For example one study examining U.

The psychology of ageing

They found that the rate at which children acquired conservation varied slightly in different countries, but that the age trends for when conservation develops are similar across borders despite cultural upbringing.

For example, one study that tested North African Wolof adolescents found they were not able to conserve in a conservation of liquid task.


Many studies have looked at variations of the conservation tasks and how these variations affect children's responses. For example, studies show that children need to be assessed both verbally and non-verbally, as assessing them solely in a verbal manner can lead test results indicating that a proportion of the children are unable to conserve, while in actuality some children are only able to answer conservation tasks correctly in a non-verbal manner.

This seemed to give children a clear reason for the second question being asked, and four-year-old children were able to demonstrate knowledge of the conservation of matter much earlier than Piaget's reported 7- to year-old threshold for concrete operations. Chimpanzees are able to make judgements on whether two quantities of liquid are the same or different, and they are able to conserve correctly when liquids are transformed based on inferences.

They are also able to correctly conserve for solid quantities, but they are not able to complete conservation of number tasks.2nd Congress of the German-speaking Association of Positive Psychology. September Nuremberg, Germany. DACH-PP is an umbrella organization for positive psychology associations in the German-speaking world, including the Swiss Positive Psychology Association (SWIPPA) and the Austrian Association of Positive Psychology (APPA).

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Conservation (psychology) - Wikipedia