Samuel and Bryant (conservation)Bandura, Ross and Ross (aggression)Hraba and Grant (doll choice) a. What do these studies tell us about human behaviour and experience? (10 marks

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A number of studies take a developmental approach and describe research carried out on children.

Using the studies from the list below, answer the questions which follow.

Samuel and Bryant (conservation)

Bandura, Ross and Ross (aggression)

Hraba and Grant (doll choice)

a. What do these studies tell us about human behaviour and experience? (10 marks)

Samuel and Bryant  (1894)~ ‘Asking only one question in the conservation experiment’

Samuel and Bryant’s study is one of many studies that have tried to test Piaget’s theory of cognitive development through criticising his methods. Before understanding Samuel and Bryant’s study, it is important to have a clear understanding of some of the arguments put forward by Piaget.

Bandura believed in adopting a social learning approach to child development. The social learning approach argues that development involves the process of learning more as one gets older. Therefore, Bandura believed that cognitive or moral progress was simply a process of quantitative change since the child will be learning more. However, Piaget’s approach to child development takes a more structuralist and qualitative approach. Piaget believed that development is a systematic and structured process. In his view, there was the presence of a qualitative difference in children’s thoughts. Piaget held the view that changes in the way a child perceived the world marked a change in cognitive or intellectual development. He thought that intellectual development happened in 4 stages and that each child could only progress to the next stage once he/she had totally mastered the first one. Piaget’s 4 maturational stages are outlined briefly below.

  • Sensory motor stage (0 – 18 months)~At this stage the child acquires a comprehension of its environment by combining the use if its senses with movement i.e. the child learns to match its senses with what it can do.

  • Pre-operational stage (18 months – 7 years) ~ At this stage the child is capable of representing objects or events by symbols or signs. In addition, the child now has the capability to use language to express ideas and also develops general rules about mental functions.

  • Concrete operational stage (7 – 12 years) ~ At this stage, the child is capable of using more advanced mental operations. For instance, the child is said to be decentred i.e. it is able to comprehend more than one aspect of a situation. However, Piaget argues that the child’s thinking is still limited in several ways, for instance, they have set ideas about the world and find it difficult to think of how it can be different.

  • Formal operations stage (12 years and more) ~ This is the most sophisticated way of thinking. The child is capable of using formal logic.

In order to demonstrate the limitations of child judgment in the pre-operational stage, Piaget utilised his well-known conservation experiment. Piaget argued that if two beakers of water (one which is tall and thin and the other which is short and fat) were showed to a child and then, if the child was asked which beaker possesses more water, the pre-operational child (i.e. the child under the age of 7) will say ‘the taller one’, even though both beakers contain the same quantity of water. Piaget provided a reason as to why the pre-operational would give such as response- he argued that it was because the child had not mastered the art of conserving volume (the capability to recognize that something may have the same volume, even though it is a different shape), which is not expected to develop until the child is in the concrete operational stage. In addition, he also established that if you roll a portion of clay into a sausage shape and you show it to a preoperational child and then roll it into the shape of a ball, the child will state that there is a greater quantity of clay in the sausage shape. He also showed that if you illustrate to a preoperational child a row of 5 buttons (spread out) and another row of 5 buttons close together, the child will answer that the row with the spread out buttons is quantitatively greater.

Piaget explained that the inability of the child to conserve was due to the child’s inability that things remain constant even though they may change in appearance. He holds the view that this is an illustration of centration i.e. the pre-operational child has not decentred and thus, is focusing only on one dimension. For instance, this is demonstrated when the child only centres on just one dimension, usually its height and this, exhibits a failure to take width into interpretation. However, some psychologists argue that Piaget’s results were a result of the structure of his original tests instead of a limitation of child thought.

The aim of Samuel and Bryant’s study was to test Piaget’s findings by changing the method used by Piaget. The participants of Samuel and Bryant’s study were 252 boys and girls between the ages of 5 and 8.5 years old. This portrays a combination of children in the preoperational stage and the concrete operational stage. They were divided into 4 subgroups of 63 children whose mean ages were 5 years 3 months, 6 years 3 months, 7 years 3 months and 8 years 3 months. In addition, each group was further divided into 3 subgroups which went through a different condition. These 3 conditions were:

  • Standard~ This is the traditional two question conservation task which was undertaken by Piaget. In this condition, the child was asked about the size of the object before and subsequent to the change of the shape.

  • One judgement~ This task is similar to the original conservation task except in this case only one question was asked (the post transformation question). This implies that the child was only questioned once about the object after it underwent the transformation.

  • Fixed array control ~ This condition involved withholding the child from seeing the transformation taking place. Therefore, the child only saw the post-transformation display (the child only viewed the objects subsequent to when they had been changed and not prior to their change. The reason for the presence of this third condition was to confirm that the children who responded correctly to the post transformation question in the other two conditions achieved this by carrying over information from the pre-transformation display.

Three different materials were used for the conservation tasks namely:

  • Mass~ This task involved the children in conditions 1 and 2 being shown 2 identical Playdoh cylinder shapes. The transformation entailed squashing one of these shapes into a sausage. Consequently, the children were asked to compare the cylinder and the sausage. The children in condition 3 also had to make this comparison without viewing the first display or the transformation process.

  • Number~ Two rows of counters of equal length arranged alongside each other were shown to the children in conditions 1 and 2. Consequently, one row was spread out or the counters were placed closer to each other. The children in condition 3 were only allowed to view the post-transformation displays.

  • Volume~ Two identical glasses with the same quantity of liquid were first shown to the children in conditions 1 and 2. Afterwards, the liquid from one glass was placed into a narrower one or into a shallow broader one. The children in condition 3 only saw the post transformation displays.

The experimenters kept records of the number of errors that the children made in the tests. Some of these errors included the child stating that one lump was larger than the other, or one row of counters was quantitatively larger than the other or one glass possessed more liquid than the other. It was learnt that:

  • The children found the one judgement task significantly easier (they made less errors) than the standard conservation task and the fixed array control. This pattern was consistent in all three types of materials.

  • The older children did significantly better than the younger ones in the conservation tasks.

  • The children made fewer errors on the number task compared with the other two tasks.

Samuel and Bryant have generated an explanation as to why the children made fewer mistakes in the one judgement conservation task compared to the standard task. It was learnt that in the standard conservation task, the pre-transformation question is pressuring the child to respond incorrectly since it is asking the same question twice (Samuel and Bryant call this the extraneous reason hypothesis). An example of this can be illustrated when the child was questioned about the volume of beakers and then saw the experimenter put the liquid from one beaker into another. The child might believe that the experimenter must have done this because he wanted a different answer to the question. This reinforces what Donaldson (1978,1982) says – the experimenter might have unwittingly forced the children to produce wrong answers against their better judgement. Another example is seen when the child was first shown two rows of counters alongside each other and then he was asked if they were quantitatively the same. Afterwards, one of the rows of counters was either lengthened or shortened and then the child was asked the same question once again. The problem with asking the same question twice is that the child may think that the experimenter wants him to change his answer.

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The conservation task shows comprehension of the principle of invariance of quantity. It was learnt that one of the reasons why young children fail problems of conservation is because their thinking is not governed by the principle of invariance of quantity i.e. they treat a perceptual change as a real one. Simply changing the length of a row of counters or squashing balls of plasticine seems to change the child’s judgements about their number or their volume.

Samuel and Bryant support the cognitive approach to child development (this approach states that as children grow older they will adopt ...

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