<p>A particular field in research on judgment and decision making (JDM) is concerned with realism of confidence in one’s knowledge. An interesting finding is the so-called format dependence effect, which implies that assessment of the same probability distribution generates different conclusions about over- or underconfidence depending on the assessment format. In particular, expressing a belief about some unknown continuous quantity (e.g., a stock value) in the form of an intuitive confidence interval is severely prone to overconfidence as compared to expressing the belief as an assessment of a probability judgment. This thesis gives a tentative account of this finding in terms of a Naïve Sampling Model, which assumes that people accurately describe their available information stored in memory, but they are naïve in the sense that they treat sample properties as proper estimators of population properties (Study 1). The effect of this naivety is directly investigated empirically in Study 2. A prediction that short-term memory is a constraining factor for sample size in judgment, suggesting that experience per se does not eliminate overconfidence is investigated and verified in Study 3. Age-related increments in overconfidence were observed with intuitive confidence interval but not for probability judgment (Study 4). This thesis suggests that no cognitive processing bias (e.g., Tversky & Kahneman, 1974) over and above naivety is needed to understand and explain the overconfidence “bias” with intuitive confidence interval and hence the format dependence effect.</p>

<p>The aim of the present study was to determine the distributions of and correlations between hand preference, visual acuity and eye preference through a series of tests in 50 males 50 females aged between 17 and 39 years. Handedness was determined through the Edinburgh handedness inventory questionnaire. The handedness distribution was: right-handed 90%, left-handed 1 %, and ambidextrous 9%. I found that 30 % had better visual acuity with their right eye, 39 % had better visual acuity with their left eye, and 31% had the same visual acuity with both eyes. 75.2% on average used their right eye in the battery of tests and 24.8% on average used their left eye. There were no statistically significant differences between the sexes or age groups with any of the measures. No correlation was found between eye preference and visual acuity or eye preference and hand preference among all subjects. No statistically significance between the sexes was found.</p>

Die Bedeutung kognitiver Entwicklungskapazität (Plastizität) und ihrer altersabhängigen Grenzen für Theorien kognitiven Alters wird thematisiert. Für kognitive Basisprozesse wird erwartet, daß die durch Training umgesetzte Entwicklungskapazität älterer Menschen zwar ausreicht, die Ausgangsleistung junger Erwachsener zu übertreffen, daß aber aufgrund altersbedingter Grenzen der Entwicklungskapazität nur sehr wenige ältere Erwachsene das Leistungsniveau trainierter junger Erwachsener erreichen werden. Am Beispiel eines Gedächtnistrainingsprogrammes zur Erhöhung der Merkfähigkeit für Wortlisten werden zwei Forschungsstrategien vorgestellt: (a) das Training von sehr leistungsfähigen älteren Erwachsenen und (b) Längsschnitt-Einzelfall-Studien. Die experimentellen Befunde bestätigten die theoretischen Erwartungen. Zwar waren die Leistungen der besten älteren Erwachsenen etwa doppelt so hoch wie die untrainierter junger Erwachsener, aber die durch das Training aufgedeckten Altersverluste konnten auch in bis zu 75 weiteren Übungsstunden nicht behoben werden. / The relevance of developmental reserve capacity (plasticity) and associated age-related limits for theories of cognitive aging is discussed. For basic cognitive mechanisms, older adults' developmental reserve capacity is expected to be sufficient to surpass young adults' baseline performance. Aging-related limits of this reserve, however, will allow only very few older adults to achieve levels of performance characteristic of trained young adults. Two research strategies (designed to engineer a mnemonic skill for serial recall of words) are described: (a) training of positively selected, mentally very fit older adults and (b) longitudinal single case studies. Experimental results were in agreement with the theoretical expectations. The best older adults scored about twice as high as untrained young adults but even with up to 75 additional experimental sessions the age difference generated by the cognitive intervention was not overcome.

The aim of the present study was to determine the distributions of and correlations between hand preference, visual acuity and eye preference through a series of tests in 50 males 50 females aged between 17 and 39 years. Handedness was determined through the Edinburgh handedness inventory questionnaire. The handedness distribution was: right-handed 90%, left-handed 1 %, and ambidextrous 9%. I found that 30 % had better visual acuity with their right eye, 39 % had better visual acuity with their left eye, and 31% had the same visual acuity with both eyes. 75.2% on average used their right eye in the battery of tests and 24.8% on average used their left eye. There were no statistically significant differences between the sexes or age groups with any of the measures. No correlation was found between eye preference and visual acuity or eye preference and hand preference among all subjects. No statistically significance between the sexes was found.

The purpose of the project was to explore sex and grade differences observed in RISA (a term used to refer collectively to relational, indirect, and social aggression). Three theories used to explain sex and grade differences, namely, gender socialization theory (Bjorkqvist, 1994;Lagerspetz & Bjorkqvist, 1994; Lagerspetz, Bjorkqvist, & Peltonen, 1988), target-value theory(Bjorkqvist, Lagerspetz, & Kaukiainen, 1992; Lagerspetz et al, 1988; Crick & Grotpeter, 1995),and symbolic capital theory (Campbell, 1993; Cashdan, 1997; Eckert, 1990; Horney 1934a, 1934b, 1934c) were reviewed, expanded upon, and tested. Theories were tested using questionnaires; however, a small subset of participants also completed individual interviews to add greater depth to information provided by the quantitative data. A second purpose of the project was to use a measure that represents the diversity of RISA items found in other measures currently used by researchers since research has suggested inconsistencies in findings may be related to item composition. Participants were 521 (301 girls and 220 boys) in grades six (n = 224), seven (n = 224) and eight (n = 73) from various Canadian schools (average age of 12.2 years) who completed the questionnaires. From this sample, 28 students completed individual interviews. Results indicated that boys and girls did not differ in regard to self-reported use of RISA; however, interviews and peer nominations indicated that girls have the reputation for engaging in RISA more frequently than boys. Post-hoc analyses indicated that the appearance of sex differences in RISA may be influenced by item choice as some items on the self-report measure were more highly reported by boys, while others were more likely to be reported by girls. There was not a great deal of support for any of the theories tested. Results indicated that the pattern of connections for predictors of RISA frequently did not differ by sex. Factors like perceived risk of or discomfort with using aggression, affective reactions to relationship threats, and care about ones own or a peers performance in a number of life domains were connected to RISA for both sexes.

This study investigated age differences in generalization of causal value employing similarity as a cue to causality. Exemplars from six food categories (A+, B-, C+, D-. E+, F-) were presented to both young and older adults in two contiguous training phases. Training Phase 1 included exemplars from categories A+, B-, C+, D-. Training Phase 2 included exemplars from A+, B-, E+, F-. Foods in the “+” categories were paired with an outcome of sickness and foods in the “-” categories were not paired with sickness. Tests of causal judgment and exemplar recognition were conducted. For causal judgment, individual exemplars experienced during training and novel exemplars from all six categories were presented. For categories A+ and B-, the categories experienced in both training phases, young and older groups generalized the causal value to the category label and to all exemplars regardless of whether they were experienced in training or were novel. For categories experienced only once in training (C+, D-, E+, F-), both groups were better able to successfully judge causal value for experienced exemplars than novel exemplars. For young and older adults, experience made a difference in the ability to generalize causal value. Experienced and novel exemplars were also presented for recognition. Participants in both age groups showed a false memory effect for individual exemplars from the more experienced categories (A+, B-) suggesting that the process that allowed them to generalize causal value also interfered with their memory for individual exemplars. There was a difference between the younger and older groups for the categories that were only experienced once in training (C+, D-, E+, F-). In this case, younger participants showed better recognition than older adults for the individual exemplars. Older adults showed the same false memory effects for these categories as they showed for categories A+ and B-. These findings suggest that older adults generalize causal value as well as younger adults, but they are less able to distinguish individual exemplars. This discrepancy may be explained by differences in ability to use verbatim and gist. Older adults’ reduced verbatim processing leads to default gist encoding that enables them to focus on category level features but not process detailed exemplar identity (Brainerd & Reyna, 1990). Younger adults appear to have a flexibility that enables them to encode and retrieve both category-level gist and verbatim individualexemplar features when the task calls for it.

The main aim of this research was to investigate the differences of women’s consumer behavior when shopping for clothes. To investigate these differences quantitative approach was used. In order to collect data for analysis a questionnaire was developed. During the study the following aspects were analyzed: frequency of shopping and expenditure, women’s values, store selection criteria, motivations and sources of information women usually use. After reviewing numerous scientific articles, eleven different hypotheses were developed, in order to be tested in the course of this study: H1: Women’s consumer behavior varies with age H2: Sexual attraction motivation decreases with age H3: Conformity motivation decreases with age H4: Fashion expression motivation decreases with age H3: The importance of comfort increases with age H6: The importance of quality increases with age H7: The importance of knowledgeable staff increases with age H8: Younger women shop clothes more often H9: The influence of impersonal sources of information increases with age H10: Younger shoppers are more price-conscious H11: It is important for older consumer to be known or recognized in the store To test these hypotheses, the data from fifty nine women was collected with the help of the questionnaire. Then, all respondents were divided into five age cohorts in order to structure the results and analyze differences in every age cohort. After having analyzed all the gathered data, five hypotheses were confirmed, while other six hypotheses were rejected. Hypothesis 1 was rather general and it was confirmed in the very beginning. All the other hypotheses were analyzed with the help of regression analysis in Excel. After testing every hypothesis, author of the thesis came to the conclusion that hypothesis 2, hypothesis 5, hypothesis 8 and hypothesis 10 are be confirmed, while hypothesis 3, hypothesis 4, hypothesis 6, hypothesis 7, hypothesis 9 and hypothesis 11 are rejected.

The purpose of the project was to explore sex and grade differences observed in RISA (a term used to refer collectively to relational, indirect, and social aggression). Three theories used to explain sex and grade differences, namely, gender socialization theory (Bjorkqvist, 1994;Lagerspetz & Bjorkqvist, 1994; Lagerspetz, Bjorkqvist, & Peltonen, 1988), target-value theory(Bjorkqvist, Lagerspetz, & Kaukiainen, 1992; Lagerspetz et al, 1988; Crick & Grotpeter, 1995),and symbolic capital theory (Campbell, 1993; Cashdan, 1997; Eckert, 1990; Horney 1934a, 1934b, 1934c) were reviewed, expanded upon, and tested. Theories were tested using questionnaires; however, a small subset of participants also completed individual interviews to add greater depth to information provided by the quantitative data. A second purpose of the project was to use a measure that represents the diversity of RISA items found in other measures currently used by researchers since research has suggested inconsistencies in findings may be related to item composition. Participants were 521 (301 girls and 220 boys) in grades six (n = 224), seven (n = 224) and eight (n = 73) from various Canadian schools (average age of 12.2 years) who completed the questionnaires. From this sample, 28 students completed individual interviews. Results indicated that boys and girls did not differ in regard to self-reported use of RISA; however, interviews and peer nominations indicated that girls have the reputation for engaging in RISA more frequently than boys. Post-hoc analyses indicated that the appearance of sex differences in RISA may be influenced by item choice as some items on the self-report measure were more highly reported by boys, while others were more likely to be reported by girls. There was not a great deal of support for any of the theories tested. Results indicated that the pattern of connections for predictors of RISA frequently did not differ by sex. Factors like perceived risk of or discomfort with using aggression, affective reactions to relationship threats, and care about ones own or a peers performance in a number of life domains were connected to RISA for both sexes.

Syftet med studien är att undersöka till vilken utsträckning människor upplever att de påverkas av media i sina attityder och åsikter kring politik, Och studera åldersskillnader mellan åldersgrupperna 18-25 och 65+. Vi ville även undersöka vilken inverkan medias politiska rapportering har på respondenterna. Det gjordes en kvantitativ undersökning i form av en enkätstudie. Enkäter delades ut till 104 respondenter, 52 i åldersgruppen 18-25 och 52 i åldersgruppen 65+. Resultatet visade att det finns vissa ålderskillnader i hur espondenterna upplever påverkan från media i sina politiska åsikter. De äldre upplever att de litar mer på TV och radio än internet medan yngre i större utsträckning litar på internet. Respondenterna visade tendenser till att uppleva att andra människor påverkas mer av media än vad de själva anser sig göra. / The purpose of the study is to investigate to what extent people experience influence from media and how that affects their attitudes and opinions towards politics, And explore age differences between the age groups 18-25 and 65+. We also wanted to study what influence political media coverage has on the respondents. A quantitative study was made in form of questionnaires that were handed out to 104 respondents, 52 to the age group 18-25 and 52 the age group 65+. The result showed that there are some significant age differences in the experiences of media influence on political views. The older people had a tendency to trust TV and radio more than internet while younger people trust internet to a greater extent. The respondents showed tendencies to believe that other people are more influenced by media than themselves.

The aim of the present study was to investigate: (a) self and age related differences in time perspective and future time orientations / (b) age differences in adaptive self-regulation / and (c) the contribution of future and self orientations and adaptive self-regulation to well-being. A questionnaire consisting of measures concerning future outlook and time perspective, adaptive self-regulation, self-construals, goals and subjective well-being variables was administered to 404 adults (191 young, 128 middle-aged, 85 older). Also, short structured interviews about time, future, end of life and age were conducted for descriptive and exploratory purposes with nine individuals, three individuals from each age group. On the basis of the results, it was concluded that, (1) older adults had less open and planful, but more anxious future outlook than younger adults, and middle-aged adults had a time perspective more like older adults&rsquo / (2) there is a difference in the content of the goals reported by each age group, and total number of goals reported by older adults was lower than the number of goals reported by young and middle-aged adults / (3) for all age groups, balanced type (i.e., related-individuated, as defined by the Balanced Integration and Differentiation, BID, model) individuals had the most favourable future outlook, and only balanced-type individuals at young, middle and older ages did not differ from each other in terms of having the most favourable future outlook / (4) balanced type individuals reengaged into other goals more than the unbalanced type individuals when they were faced with an unattainable goal / (5) goal reengagement increased with having more open future time perspective, and the contribution of open future time perspective to goal reengagement was much more for middle-aged and older adults than younger adults / (6) self orientations, future time perspective and goal reengagement contribute to well-being, and contributions of future time perspective and goal reengagement to well-being after the contribution of self orientations were considerable only for young and middle-aged adults / (7) gender was not found to have a significant effect on goal reengagement and well-being, but women had slightly more anxious and fatalistic future attitudes than men.