To What Extent and in What Ways Are People "fixed" and "open to Change"?

Charles Darwin was not only a pioneer in evolutionary psychology, also today's theories of modern lifespan development draw on and are influenced by Darwin's ideas. His functionalist perspective primarily focused on the reason for development of specific human characteristics over many generations, and therefore an enormously long timescale. However, inspired by the observations in the development his own son, Darwin also acknowledged that "an individual is the result of a gradual sequence of prior changes, both in a broad evolutionary sense and within individual's own lifetime and further development and changes lies ahead" (Cooper and Roth, p.50, 2003). This notion provided the basis for other researchers to further explore the development of humans over a lifetime period.

The human lifespan development can be explored in many different ways, e.g. in terms of biological maturity of the body from a new-born to a physically fully-grown adult, physical deterioration in later stages of live and how that effects people psychologically. Individual physiological and psychological characteristics are potential factors that have different impact on each individual, they therefore are considered as "internal influences" (Cooper and Roth, p.5, 2003). The development of cognitive abilities, specific historical circumstances or the social and cultural environments of each person present "external influences" (Cooper and Roth, p.5, 2003).

It has to be noted that both internal and external factors can influence each other. We therefore we have to look at these transactions rather than just taking single factors into consideration.

Initially, researchers considered the observation of children as a very instructive means in investigating at what point of time certain changes in human behaviour evolve. Through identifying a pattern of changes that take place in the development of a new born into a fully grown adult, researches developed the organismic approach. They believed that in order to achieve adulthood, people go through different phases and that a later stage incorporates and expands on the experiences from an earlier stage in life ("stage theory"). While adulthood was considered as the end-stage, external factors were identified as potential causes for a delay, acceleration or slowing-down in certain stages of development, but it was suggested that the pattern and order of developmental stages are fixed.

Jean Piaget adopted the organismic approach and based his opinion on his research on the intellectual development of children. He himself called his area of interest "genetic epistemology" (Cooper and Roth, p.5, 2003). It aimed to identifiy how human delevop cognitive capacities.

Piaget recognized that errors that children made in intelligence tests apparently occurred systematically and used these errors to identfy the mental processes in achieving cognitive abilities. He identified four stages in which children intellectually adapt to their environment but, characteristically for the organismic approach, also believed that intellectual maturity is achieved as an end-product. He considered that with achievement of adulthood our cognitive abilities are fixed.

Today almost every adult is, voluntarily or forcefully, faced with new intellectual challenges throughout his/her life. Whether it is learning a new language or taking on a new job, enrolling at a long-distance

university or taking up courses in a particular area of interest or hobby, our adult intellect is still frequently required to adapt to changes and progress.

While Piaget failed to acknowledge learning processes of adults, he also did not account for external influences such as access to educational support, cultural and social surroundings as well as internal influences e.g. confidence, motivation that can very much influence the level of attainment. He has been criticised for his very simplistic approach of human intelligence and has neglected to consider the dynamic interactionism that plays an important role in shaping people's cognitive abilities, e.g. a person's social interactions.

John Bowlby, for example, drew on previous research on the significance of the influence of parents or other care-takers during childhood on human development. He believed that there are consistent connections between infancy and adulthood in how individuals transact in their environment. His concept, which is embedded within the "attachment theory", states that "children feel secure by forming an emotional bond with a primary care giver" (Cooper and Roth, p.20, 2003), who he calls the "mother figure" (Cooper and Roth, p.29, 2003). In order to create this secure base, Bowlby presupposed the creation of an "internal working model", the construction of a mental understanding of how a person perceives himself, the mother-figure and the relationship between the two.

The individual differences in the construction of internal working models was later demonstrated by Mary Ainsworth, who, through an experimental laboratory experiment, identified three different types of attachment. Through observing sequences of separation and reunion of children and their care-takers, which today is known as "The Strange Situation", she classified the three types as: "insecure, anxious avoidant", "secure", and "insecure, anxious ambivalent" (Cooper and Roth, p.31, 2003), all characterised by a different internal working model.

Ainsworth reported her findings to Bowlby, who believed that the respective attachment type gained by an infant is very likely to reflect on her relationships with other people throughout her life. He further suggested that our personal interactions in adulthood are not only preset by our attachment-status, but also can not change during later stages of life. Longitudinal studies in Germany and the USA have revealed contradictory findings and suggest, that other life-events, both positive and negatively, affect the flexibility of attachment-status. If individuals were really pre-determined and fixed during early stages of infancy, any therapy with children who were maltreated or abused by their care-takers during childhood would be unsuccessful.

Also, different attachment-types have to be viewed very much in the light of cultural-contexts. Whereas our cultural society might characterise "secure" as a beneficial attachment style, other cultures might encourage a different type of attachment. For example, differences in the upbringing of children in Western and Asian cultures are very apparent and