Convenience sampling is a type of nonprobability sampling that involves the sample being. Pdf comparison of convenience sampling and purposive sampling. It involves a twostep process where two variables can be used to filter information from the population. Convenience sampling definition of convenience sampling. Convenience sampling pemilihan sampel sesuai dengan keinginan peneliti. Pdf on oct 25, 20, philip sedgwick and others published convenience sampling find. Accidental sampling is convenience in reading the sampling population, mostly used among marketers or newspaper researchers. Convenience sampling and purposive sampling are nonprobability sampling techniques that a researcher uses to choose a sample of subjectsunits from a population.
Examples of convenience samples include mall intercept interviewing, unsystematically recruiting individuals to participate in the study e. This study has some limitations which include crosssectional study design, communitybased convenience sampling technique 75 introducing sampling bias, selfreport measures of pa and sb, and. Convenience sampling an overview sciencedirect topics. Simple random sampling and systematic sampling simple random sampling and systematic sampling provide the foundation for almost all of the more complex sampling designs based on probability sampling. The aim of this study is to compare among the two nonrandom sampling techniques in order to know whether one technique is better or useful than the other. A convenience sample is one of the main types of non probability sampling methods. Convenience sampling also known as availability sampling is a specific type of nonprobability sampling method that relies on data collection from population members who are conveniently available to participate in study. In probability sampling, each element in the population has a known nonzero chance of being selected through the use of a random selection procedure. A simple definition of a sampling frame is the set of source materials from which the sample is selected. It can easily be administered and helps in quick comparison.
An example might be surveying students in ones class. A mall sample consists of the people willing to be interviewed on certain days at certain shopping centers. This is a type of sampling technique that does not rely upon a random process, such as we see in a simple random sample, to generate a sample. History of sampling contd dates back to 1920 and started by literary digest, a news magazine published in the u. Digest successfully predicted the presidential elections in 1920, 1924,1928, 1932 but. A typical sample of convenience comprises the investigators students in an introductory course. Failed in 1936 the literary digest poll in 1936 used a sample of 10 million, drawn from government lists of automobile and telephone. Nonrandom sampling is widely used as a case selection method in qualitative research, or for quantitative studies of an exploratory nature where random sampling is too costly, or where it is the only feasible alternative. The caution with convenience sampling is not to generalize the broader population because there is no justification to claim that the sample is representative of the. Definition of convenience sampling in the financial dictionary by free online english dictionary and encyclopedia. Although sampling has farreaching implications, too little attention is paid to sampling. The act, process, or technique of selecting an appropriate sample.
Personal telephone postal internet the quality of the responses is guaranteed by the extensive experience and professionalism of our interviewers, all inhouse, by the levels of supervision, by the transparency of all production processes and by. Each of the sampling techniques described in this chapter has advantages and. Thus, our snowball sampling method actually integrates initial convenience sampling. Generalization to a population can seldom be made with this procedure.
Sampling is a key feature of every study in developmental science. Convenience sampling financial definition of convenience. The sampling frame is the list from which the sample is selected, so the quality of the sampling frame affects the quality of the sample. Convenience sampling definition psychology glossary. Convenience sampling subjects are selected because they are easily accessible. In addition, adequate information on the frame must be available to conduct sampling, data collection, weighting and nonresponse bias analyses. Lets say you are a marketing student who works parttime as a gym instructor. This section covers issues on frames and their development with emphasis on multistage sample design. Dictionary grammar blog school scrabble thesaurus translator quiz more resources more from collins.
Probability sampling is defined as a method of sampling that utilizes forms of random selection method. Convenience sample definition of convenience sample by. Quota sampling is the nonprobability equivalent of stratified sampling. Population, sample and sampling distributions i n the three preceding chapters we covered the three major steps in gathering and describing. Probability sampling is also referred to as random samplingor representative sampling. Promotion of our project by the seed, who is a known community member, may have encouraged attendance. A number of examples of convenience sampling can be given. In this lesson, you will learn about convenience sampling, including its definition, some examples, its benefits, and its limitations. Convenience sampling is a sampling method a way of gathering participants for a study used where a you select a naturallyoccurring group of people within the population you want to study. Insights from an overview of the methods literature abstract the methods literature regarding sampling in qualitative research is characterized by important inconsistencies and ambiguities, which can be problematic for students and researchers seeking a clear and coherent understanding.
The advantages of this type of sampling are the availability and the quickness with which data can be gathered. Units are not purposefully or strategically selected. Convenience sampling is a sample taken from a group you have easy access to. Assessing limitations and uses of convenience samples. Although, nonprobability sampling has a lot of limitations due to the subjective nature in choosing the sample. Quota sampling mirip dengan sampling acak berlapis namun pemilihan elemen dari stratum tidak acak 3. The definition also encompasses the purpose of sampling frames, which is to. A group of research subjects selected casually, without scrupulously randomizing them, usually because they are easily accessible to the researcher. Sampling definition and meaning collins english dictionary. In general, probability sampling is considered to be more stringent and accurate than nonprobability sampling, but it is not always feasible. Contacting members of the sample stratified random sampling convenience sampling quota sampling thinking critically about. Judgmental or purposive sampling the sampling design is based on the judgement of the researcher as. With nonprobability sampling, researchers have no way of calculating how well their sample represents the population as a whole. Purposive sampling pemilihan elemen untuk menjadi sampel berdasarkan pertimbangan yang tidak acak, subyektif 2.
Convenience sampling is a type of sampling where the first available primary data source will be used for the research without additional. Sometimes a convenience sample is called a grab sample as we essentially grab members from the population for our sample. Chapter 3 research design, research method and population 3. Convenience sampling educational research basics by del. Convenience sampling is a method of collecting data samples from people or respondents who are easily accessible to the researcher. Convenience sampling was used to recruit participants from patients admitted to one of six hospitals in the west of scotland with an acute exacerbation of chronic obstructive pulmonary disease. Despite the potential limitations of convenience sampling, it is. Pdf comparison of convenience sampling and purposive.
A convenience sample is made up of people who are easy to reach or who are conveniently available to participate in study. When time or cost is a factor, some researchers might use convenience sampling. Sampling techniques introduction to sampling distinguishing between a sample and a population simple random sampling step 1. Introduction this tutorial is a discussion on sampling in research it is mainly designed to eqiup beginners with knowledge on the general issues on sampling that is the purpose of sampling in research, dangers of sampling and how to minimize them, types of sampling and guides for deciding the sample size. A convenience sample is formed when we select elements from a population on the basis of what elements are easy to obtain. Yamane, p3 examples of nonprobability sampling used extensively in 1920s and 1930s are the judgment sample, quota sample, and the mail questionnaire. The use of convenience sampling technique is discouraged by many dissertation supervisors due to inability. The word the word random describes the procedure used to select elements participants, cars, test items from a population. One of the most common examples of convenience sampling is using student volunteers as subjects for the research. The sampling report summary and transition to the next. Convenience definition is fitness or suitability for performing an action or fulfilling a requirement. Ch7 sampling techniques university of central arkansas. However, the pros and cons of convenience sampling presented here cant be denied that although it has some advantages, it also have disadvantages. Convenience sampling article about convenience sampling.
English department, faculty of persian literature and foreign languages. They are also usually the easiest designs to implement. Each of the sampling techniques described in this chapter has advantages and disadvantages. This technique is also referred to as accidental sampling, and is commonly used in pilot studies prior to launching a. Then convenience or judgment sampling is used to select the required number of subjects from each stratum. Quota sampling is a sampling methodology wherein data is collected from a homogeneous group. In convenience sampling, no attempt is made to use a random sample or a sample that represents a specific subset of the population. Convenience sampling is a type of nonprobability sampling in which people are sampled simply because they are convenient sources of data for researchers. Comparison of convenience sampling and purposive sampling. This sampling method is based on the fact that every member in the population has an equal chance of getting selected.
Learn more with probability sampling example, methods, advantages and. Perhaps it depends on the type of research being conducted. It has the same advantages and disadvantages as quota sampling and it is not guided by any obvious characteristics. Comparing two sampling methods to engage hardtoreach. Transcripts for this study were selected from 51 interviews based on the examples of stories shared in answer to the two questions stated above.
For instance, to draw a simple random sample of 100 units, choose one unit at random from the frame. A convenience sample is a nonprobability sample in which the researcher uses the subjects that are nearest and available to participate in the research study. The basic idea in sampling is extrapolation from the part to the. In probability sampling, each element in the population has a known nonzero chance of being selected through the use of a. Sampling, measurement, distributions, and descriptive statistics chapter 9 distributions. Sampling distributions in agricultural research, we commonly take a number of plots or animals for experimental use. Like stratified sampling, the researcher first identifies the stratums and their proportions as they are represented in the population. First, lets discuss the definition of convenience sampling. In addition, attendance to all meetings was higher for the snowball sampling recruits than for purposive plus convenience sampling. A process of selecting subjects or units for examination and analysis that is based on accessibility, ease, speed, and low cost. Convenience sampling is defined as a method adopted by researchers where they collect market research data from a conveniently available pool of respondents. Convenience definition of convenience by merriamwebster.
In nonpraobability sampling, often, the surveyor selects a sample according to his convenience, or. Information collection in 2010, we conducted over 1. A statistical method of drawing representative data by selecting people because of the ease of their volunteering or selecting units because of their availability or easy access. Here, we describe, discuss, and evaluate four prominent sampling strategies in developmental. It is the most commonly used sampling technique as its incredibly prompt, uncomplicated, and economical. We have discussed the systematic error of the literary digest poll. Statisticians have a low opinion of convenience sampling.