Natural Population Sampling
What Is the Natural Population Of a Site?Every web site has its own unique population of visitors. The population is created by:
the services or products
Those who come to visit a web site, for whatever reason and by whatever path, constitute the Natural Population of the site.
Measuring the Natural Population
To develop a web based business, you need to know everything you can about the Natural Population of your site. The iDiary system is the only commercially available tool that can do the job.
The iDiary system:
selects a representative
sample of the Natural Population,
This information is integrated into a powerful, single source database that provides unparalleled insight on how visitors to a target site think, feel, and behave on the Internet.
Advantages of Natural Population Sampling1. "Fresh" Samples.
The sample is selected at the beginning of
2. Unrestricted Sample Size.
The iDiary system can select as large a sample as is required to provide statistical reliability for any estimates regarding the target site.
Competing systems that use standing panels of Internet users are severely restricted in the sample size they can deliver for all but the most highly visited web sites. For example, if your web site is visited by 200,000 unique visitors per week or per month, its rating as reported by a national standing sample of say 50,000 respondents, would be 0.2%. This translates to about 100 respondents -- not enough for a statistically reliable analysis.
3. Targeted Sub Populations.
If for example frequent visitors e.g., once a month or more often, are required in a study a screening survey can be used to oversample this group until the required sample size is achieved. The screening survey delivers very large samples resulting in extremely precise estimates of all Natural Population characteristics and groups it measures.
Multiple target groups can be selected in any one study.
Recall vs. Behavior DataThe availability of single source data for Internet behavior and attitudes greatly increases the accuracy of statistics that rely on recall. The Internet is simply too big and the detail of behavior too complex for users to accurately remember in recall-based opinion surveys.
Methodological tests that compared recall based responses vs. actual behavior as measured by the iDiary system, indicate that recall often tends to significantly overstate behavior.
The combination of exacting methodology and cutting-edge technology
that are the foundations of the iDiary system, provide a level of accuracy
and reliability that distinguish it from all competing Internet measurement
iDiary - Internet Measurement system is a product of ViewStats Research Inc.