0
How are observational studies of populations different from experimental studies?
Wiki User
∙ 12y ago
Potato skins.
Wiki User
∙ 12y ago
Add your answer:
Earn +20 pts
Cause and effect conclusions can be drawn from what kind of studies?
Experimental
What type of experimental studies did Wilhelm wundt's do?
Sensory stimulation!
The first experimental studies of associative learning were conducted by?
Ivan Pavlov
What is the Difference between experimental and non experimental?
Non-experimental research is done by examining data from other research studies and compiling observations. There are no original experiments conducted in this type of research. Experimental research is done by conducting original experiments.
What are some of the key similarities and differences between archival studies and naturalistic observation?
Observational research is where the researcher just observes the ongoing behavior of a subject. Archival studies is where the person goes out and interacts with the subjects and their behaviors.
How are observational studies of population different from experimental studies?
Potato skins.
In what studies do scientists not interfere with what is going on?
observational studies
What are the two main types of data a scientist collect?
Data will be either qualitative (non numerical description) or quantative (numerical values assigned to a property). To give you an example, a meterologist may describe the sky on a particular day as cloudy (qualitative) with a 5 mile per hour wind (quantative). Studies can be classified as experimental studies or observational studies. The experimental study means that the scientist is able to treat or alter in some way the population. Medical studies of drugs frequently conduct experimental studies and collect experimental data. Observational studies, we collect data without altering the population. A good example is astronomical studies, where it is impossible to alter the population. Scientific studies need to be thorough investigations relying on good data and sufficient quantity of data in order to reach conclusions.
Disadvantages of obsevation in data collection?
Surveys or studies that involve collection of data can be categorized as either observational or experimental. The experimental study occurs in a very controlled environment where some treatment is applied to the subjects. Data collection measures the change in some attributes of subjects after treatment. Wikipedia terms observational studies as "uncontrolled experimental studies." See related link. Observational studies can be more difficult as follows: 1. The controlled environment may be missing. Suppose I am asking people if they like a particular product. Some may have used this product, others may have heard bad things about it from friends. The influences can be numerous. 2. The means of obtaining a representative sample may be complicated. Suppose I am interested in determining if a particular pollutant is causing any harm. I would go to an area where the pollutant was the highest and examine people complaining of problems. Perhaps other pollutants are higher in this particular area. I have confounding problems. 3. The observational study often suffers from an inability to do "identical, repeated trials" as it does not initiate a particular treatment. This inability can result in erroneous conclusions, particularly when data is scarce and develops over time. This is particularly true in epidemiology studies, where the area to be studied and the time required to reach a conclusion depend on the phenomena being studied. If the disease is changing with time, it may be impossible to reach a conclusion even after many incidences have occurred. Does this mean we should just rely on experimental data? No, because in many areas which involve spatial analysis (astronomy, mining of minerals, epidemiology), experiments are not possible. Many disease studies depend on both experimental data and observational surveys.
A person who studies reasons for rising and falling populations is a?
A person who studies reasons for rising and falling populations is a Demographer
Which of the following is an important advantage of experiments over observational studies?
The main possible advantage is that in an experiment, it is possible to control some of the variables so that it is easier to measure the effect of key variables. In observational studies, no such control is possible.
What are the benefits of observational rather than lab based evaluations?
Observational techniques, typically, place the user in the eventual context in which a system will be operated. In contrast, lab-based techniques rely upon careful control of variables that might otherwise confound experimental results. Lab based studies can be used to make direct and fair comparisons between different systems using statistical measures of significance . In contrast, observational studies provide rich insights into the application of an interactive system but it can be difficult to make such direct comparisons when the experience of interactive with the system can be influenced by a host of factors that are difficult to replicate for each system within the eventual context of use.
Which type of primary research requires no direct involvement with human subjects?
Observational studies
Are observational studies bias?
If the observer and the observing equipment are unbiased then there is no reason for the study to be biased.
What are the difference between an experiment and an observation?
In an experiment investigators apply treatments to experimental units (people, animals, plots of land, etc.) and then proceed to observe the effect of the treatments on the experimental units. n an observational study investigators observe subjects and measure variables of interest without assigning treatments to the subjects. The treatment that each subject receives is determined beyond the control of the investigator. For example, suppose we want to study the effect of smoking on lung capacity in women. Summary: 1.The main difference between observational study and experiments is in the way the observation is done. 2.In an experiment, the researcher will undertake some experiment and not just make observations. In observational study, the researcher simply makes an observation and arrives at a conclusion. 3.In observational study, no experiment is conducted. In this type of study the researcher relies more on data collected. 4.In an experiment, the researcher observes things through various studies. 5.There is human intervention in experiments whereas there is no human intervention in observational study. 6.Hawthorne studies are a good example for experiments. 7.The study to determine the relation between smoking and lung cancer is a typical example for observational study.
How do you spell soilso studies?
The study of information related to people and populations is "social studies".
Cause and effect conclusions can be drawn from what kind of studies?
Experimental
