Public Health Research Methods For Research

Theories are a series of interconnected proposals. Theories are an effort to describe, explain, predict, and finally control a period of events. We are able to base our experiments and select the contenders for the experiments off of our theories. We are able to test our theories by how well the cumulated data describes, relates to and predicts reality. Theories act as patterns for interpreting specific data that we may refer back to. These patterns ensure we stay on topic and are able to obtain the proper results needed to verify our theories.

Methods used in psychological research are used to obtain quantitative or qualitative data. Quantitative data is more often than not derived from methods such as experiments and statistics analysing data using surveys, questionnaires and interviews. Qualitative data tends not to be aimed at finding exact measurements in its findings, but is more concerned with evidence collection and analysis through practices such as observation and ethnography (using observations through involvement in activities over a period of time) (Brownlow 2011).

A theory is a set of systematic informed hunches about the way things work. A good theory goes beyond accepted wisdom and offers explanations and speculations about phenomena. Additionally, a good theory consists of a system of concepts which means that the theorist were able to make connections among his ideas. A theory tends to shape our perception of reality and behaviour and guides us through unknown areas.

It is common for researchers to compare qualitative and quantitative research methods. Quantitative methods originate from positivist and post- positivist research paradigms. Also, the methods objectively examine statistical data to determine cause and affect and often use generalizable data. There are various methods used in quantitative research such as surveys,

Quantitative research methods are objective as it uses measurements and analysis of statistical data to answer the study question. The researchers’ opinions do not affect the outcome of the study, ensuring that the study is unbiased. Another advantage is quantitative research uses numbers and statistics which is understood universally (Houser,2008).

A theory is different from a hypothesis due to the fact that a hypothesis is a presented report based on limited information, which occurs in the first step of the scientific method. While a theory is a hypothesis that has not been rejected based on substantial information and evidence, such as testings, data collections, and data analysis. This also occurs during the last steps of the scientific method.

A theory is an explanation of why or how things are related to each other (Bohm & Vogel, 2011). Additionally, a theory is defined as a plausible or scientifically acceptable principle, or a body of principles, offered to explain phenomena (Merriam-Webster Dictionary, 2017). Furthermore, crime theories examine and attempt to identify relationships among humans, criminal behavior, and specific factors such as biological factors, psychological factors, sociological factors, and economic factors (Bohm & Vogel, 2011). Since we have defined a theory, let us further discuss how theories are created beginning with the components of a theory.

Both the health belief model (HBM) and theories of reasoned action/planned behavior (TRA/TPB) are two model that has their root from psychology. Both models rely on social cognition as a mechanism to change individuals’ behaviors. Opponent criticizes the models for being unable to target social influence outside of an individual and overlook difference between target audiences.

When considering health psychology it is important to recognise the various models it is made up of. The basis of this essay will be to take a look at the health belief model and the theory of planned behaviour, considering their historical origins, the positives and negatives of applying these approaches and examples of when they have been used. After some analysis it may offer some insight into possible improvements that could be implemented from further research. Also included will be an overview of how the models compare to each other and critical evaluation of research from this field.

The topic that I have chosen to look at is obesity. The aim of this topic is to find out whether “the ignorance of genetics as a contra factor of obesity”. I have chosen to look at this topic because obesity is concerns me. Obesity has always been a bid debate for a long time now and I was intrigued to find out more about the topic and the cause of obesity. The fact that obesity has made deadlines news in recent years. There are a lot of misconceptions about obesity such as overweight is caused by a sow metabolism. There have been a lot of beliefs and myths about obesity in society today and he above myths is on of them. According to Donnellan (1998) ‘ ‘people who are overweight have told their doctors that they eat no more and

A theory is primarily meant to explain or predict an event, behaviour or outcome. Proponents of a theory look for evidence to support the theory. This evidence should be independently observed and consistent after repeated observations. Some theories are speculative or ideas or guesses floated to encourage researchers to undertake the observations required to prove or disprove the theory. The question often debated is what comes

The Health Belief Model (HBM) is one of the first theories of health behavior. It was developed in the 1950s by social psychologists in the U.S. Public Health Services to better understand the widespread failure of tuberculosis screening programs. Today it continues to be one of the most widely used theories. Research studies use it to explain and predict health behaviors seen in individuals. There is a broad range of health behaviors and subject populations that it is applied in. The concepts in the model involve perceived susceptibility, perceived severity, perceived benefits, perceived barriers, cues to action, and self-efficacy. Focusing on the attitudes and beliefs of individuals being studied create an understanding of their

Health belief model was one of the first and most widely recognized theories of health behavior. (Butts & Rich, 2011). This theory was formulated in an attempt to predict health behaviors by focusing on the attitude and beliefs of individuals. It is aimed to determine the likelihood of an individual to participate in health-promotion and disease prevention programs. (Kozier & Erb, 2011). This theory postulated that if a patient is well- motivated, there is a possibility that he will participate in these activities. Motivation can be derived by the individual's perceptions towards his condition. According to Becker (1974), individual perceptions include patient's perceived susceptibility, perceived seriousness of the disease and perceived threat.

Quantitative research is considered to be the use of numbers. In the use of a quantitative study, the researcher test objective theories by examining the conjunction among variables. The variables used can be measured on instruments, so that numbered data can be used and analyzed (Creswell, 2008). Qualitative research is mainly used to explore and understand human or social problems. The process of qualitative studies includes questions and procedures; and the data is collected byway of participant’s settings. It allows the researcher to study an issue in great detail and depth, as well as not allowing data collection to be constrained by predetermined data. Mixed methods research combines quantitative and qualitative methods and it involves philosophical assumptions. This form of study includes collecting and analyzing data from a quantitative and qualitative perspective. It is believed that mixed methods research is a great method for practicing researchers who would like to bridge the schism between quantitative and qualitative research (Onwuegbuzie & Leech, 2004a). Even though these methods are different, they all involve philosophical assumptions and distinct methods or procedures (Cresswell, 2009).

According to Haralambos and Holborn (2008), a theory is a set of ideas which attempts to explain how something works.