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 3 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
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 reliable
- 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.
How do you overcome a breach of protection from harm?
The researcher must inform the participant that they have the right to leave at any time. If the participants are left affected as a result of the experiment, researchers are allowed to offer therapy and gain their consent after the experiment.
what does Confidentiality mean?
The participant’s identity and data should be kept anonymous and should be inaccessible. It should not be obvious that a participant has performed in the study