Research methods 1 Flashcards
what is a frequency table?
A ‘table is a systematic way of representing data so it is organised in rows and columns. A frequency table displays a record of the amount of times an event happens
what is a bar chart?
A type of graph in which the frequency of each variable is represented by the height of the bar. The categories on the x-axis have no fixed order and there is no true zero.
what is a histogram?
a type of graph where the frequency of each category of continuous data is represented by the height of the bar. In contrast to a bar chart, the data in a histogram have a true zero and a logical sequence. There are no spaces between the bars.
what is normal distribution?
A symmetrical spread of frequency data that forms a bell-shaped curve. The mean, median and mode are all at the same point - the highest peak
what is continuous data?
A graph where data that can take any value and can keep expanding over time e.g. height, weight, IQ
what is true zero?
The zero point on a graph represents the absence of the variable being measured e.g. weight, height, time
Outline one difference between a histogram and a bar chart
A histogram’s bars are touching however, a bar charts bars are separate from each other
Identify two features of a normal distribution curve
The mean, median and mode is at the peak of a normal distribution curve, where it is the same, and the distribution curve is symmetrical, meaning that ends of the curves follow the same pattern.
what is meant by ‘positive correlation’ ?
When one co-variable increases, the other increases OR when one co-variable decreases the other decreases too.
what is meant by ‘negative correlation’?
when one co-variable increases, the other decreases
what is meant by ‘no correlation’?
when there is no relationship between the two co-variables
define the term ‘correlational analysis’
A research method that aims to study the relationship between 2 or more co-variables. Will vary in strength and could be a positive, negative or no correlation.
what is the relationship between the correlation co-efficient and the strength of the relationship?
the higher the correlation coefficient, the stronger the relationship
what is a correlation coefficient?
It is how strong or weak a correlation is and can range from -1 (perfect negative), 0 (no correlation) to +1 (perfect positive. -1 being the weakest possible relationship and +1 being the strongest.
describe 4 strengths of using correlational analysis
- they are a good starting point for research, where they tell us that two variables are related.
- It provides valuable insight about the relationship between variables. This is because the correlational co-efficient indicates the strength the relationship has
- they help identify patterns between variables which might lead to new research + theories
- since the relationship is displayed on a graph, it allows it to be easy to analyse and to draw comparisons about the data
name another advantage of using correlational analysis
A correlation can be used when it would be impossible or unethical to carry out an experiment
name 3 weaknesses of using correlational analysis
- in order for a correlation to be informative, there needs to be a large amount of data for each variable. correlations based on small populations are not very valid
- there could be another unknown variable that is intervening with the relationship that may be overlooked, causing incorrect conclusions being drawn about the relationship
- we have no way in knowing if one variable caused the other or vice versa, which means that cause and effect cannot be established
what is meant by ‘correlation’
a mathematical technique used to investigate the relationship or association between two variables, called co-variables
what is a ‘scatter diagram’
correlations are plotted on scatter diagrams, where the strength and direction of a relationship between co-variables are represented.
where are the co-variables placed across a scatter diagram?
X-AXIS: co-variable that is being measured e.g. number of participants
Y-AXIS: co-variable that is increasing e.g. levels of aggression
define the term ‘ethical issues’
When a psychologist conducts research, they must consider ethical issues. There are concerns about what is morally right or wrong when using participants in research. Ethical issues occur when there is a conflict between the needs of the research and the rights of the participants.
what is the BPS?
the British Psychological Society is a psychological organisation that puts forward a code of conduct that every psychologist in the UK is made to follow. It explains how participants should be dealt with.
what does PCWID stand for?
P - Protection from harm
C - Confidentiality
W - Withdrawal (rights)
I - Informed consent
D - Deception
What does protection from harm mean?
Participants shouldn’t be placed at risk, and their physical, psychological and emotional health should be protected at all times.