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IB Psychology Studies
Studies to have memorized for IB testing
Terms in this set (10)
Sperry(1968) and Gazzaniga(1967)-research with split-brain patients
Aim: To investigate how the two hemispheres function independently when the connection between them is severed
Participants: 4 patients who had novel treatment for epilepsy where they surgically cutting the corpus
Method: An in-depth case study of 4 patients
Findings: Localization of language is not strict, language production and language comprehension are mostly localized are mostly localized in the left hemisphere, but, the right can also perform some simple tasks
Draganski et al (2004)- structural changes in the brain response to juggling
Aim: To investigate whether structural changes in the brain would occur in response to practising a simple juggling routine
Participants: self-selected sample of volunteers with no prior experience of juggling
Method: Experiment; mixed design
Finding: Grey matter grows in the brain in response to environmental demands(learning) and shrinks in the absence of stimulation(lack of practice). This shows that there is cause-and-effect relationship between learning and brain structures.
Maquire et al. (2000)- neuroplasticity in London taxi drivers
Aim: To investigate how the brain structure of London taxi drivers is different from the average brain
Participants: 16 right-handed male taxi-drivers. The average experience as a taxi driver was 14.3 years. A control group of 50 healthy right-handed male subjects who did not drive a taxi.
Method: Quasi-experiment (comparison of two pre-existing groups); correlational study in the part where driving experience was correlated with grey matter volume. MRI was used to measure variable
Finding: Redistribution of grey matter in the hippocampus occurs in the taxi drivers in response to gaining navigational experience. The posterior hippocampus known to be involved in using previously learned spatial information, while the anterior hippocampus is known to be responsible for learning new spatial information.
Crockett et al (2010)-the effect of serotonin on prosocial behaviour
Aim: To investigate the effect of serotonin on prosocial behaviour
Participants: 30 healthy volunteers
Method: Experiment; repeated measures design. The design was counterbalanced. The study was double-blind.
Finding: Citalopram reduces the acceptability of personal harm and in this sense promotes prosocial behaviour. Increased levels of serotonin in the brain may cause people to be more opposed to the idea of inflicting harm on someone.
Freed et al (2001)-the role of dopamine in Parkinson's disease
Aim: To investigate the effects of dopamine on the behavioural symptoms of Parkinson's disease.
Participants: 40 participants with severe Parkinson's disease. The mean duration of the disease was 14 years and the ages ranged from 34 to 75 years old.
Method: Experiment; independent measures design
Findings: Transplantation of dopamine-producing neurons in the putamen of patients with severe symptoms of Parkinson's disease leads to an improvement in younger but not older patients. This shows the influence of dopamine on behaviour.
Ferguson et al (2000)-social amnesia in mice lacking the oxytocin gene
Aim: To investigate the role of oxytocin in social memory in rodents
Participants: 42 oxytocin gene knockout mice and 42 mice with normal genotype. All mice were male
Method: Experiment; mixed design (independent and repeated measures design)
Findings: Oxytocin is necessary for the development of social memory in mice. It plays a role in recognizing familiar members of the same species.
Hare et al (2017)-the ability of androstadienone(AND) and estratetraenol(EST) to signal gender and attractiveness
Aim: To investigate if AND and EST signal gender and affect mate perception
Participants: 104 heterosexual adults
Method: Experiment; repeated measures design
Findings: The two chemicals (AND and EST) do not act as signals of gender or of attractiveness. Based on this result, researchers concluded that these chemicals do not qualify as pheromones
Lundstrom and Olsson (2005)-effects of androstadienone(AND) on women's attraction to men
Aim: To investigate the effect of AND on the mood of women in the presence of men
Participants: 37 heterosexual women , mean age 25 years, with a normal menstrual cycle
Method: Experiment; 2x2 experimental design (two independent variables with two levels each)
Findings: AND may serve the function of signaling sexual attractiveness, which supports its role as a pheromone
Scarr and Weinberg (1983)- the Transracial Adoption Study
Aim: To investigate environmental malleability of intelligence
Participants: The study looked at 101 adoptive families who had both biological and adopted children. Some of the adopted children were black and some white. Some were children adopted in the first 12 months of life and some were adopted later. The study took place in Minnesota
Method: Adoption Study
Conclusion: Results of the study may seem somewhat contradictory at first. On the one hand, there was a considerable in the IQ of adopted children. On the other hand, the correlation was higher with the IQ of biological parents, not adoptive parents. These results demonstrate the idea of additive influence of genetics and environment in the development of IQ.
Caspi et al (2003)- the 5-HITT gene and its role in depression
Aim: To investigate the role of the 5-HITT gene in developing depression in response to stressful life events
Participants: 1,037 children from New Zealand
Method: A longitudinal study. Genetic mapping was used to divide participants into three groups: both short alleles of 5-HITT(s/s), one short alleles and one long allele (s/l), and both long alleles (l/l)
Findings: It was concluded that the 5-HITT gene is responsible for modulating an individual's vulnerability to stress.
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