Final answer:
In an appraisal, data should be verified through at least five reliable sources such as academic journals, magazines, reputable websites, and geographic sources. Accurate data collection is crucial and involves comparing and researching discrepancies among sources. Accurate record-keeping of information and ideas is equally important for reporting.
Step-by-step explanation:
When conducting an appraisal, it is imperative to gather data that is accurate and reliable. An appraiser should verify data by consulting and citing at least five reliable sources. These sources may include academic journals, newspaper articles, magazines, reputable websites, government publications or agency websites, and geographic information sources like aerial photographs and maps.
Collecting data on prices, for example, might involve visiting or calling thousands of stores or conducting surveys with landlords or tenants. It is also crucial to examine and compare information from different sources, noting any discrepancies and conducting additional research to find a reliable consensus view. Always keeping track of ideas and information, whether it is via digital means or physical documentation, is essential for organizing and reporting findings.
Evidence is at the core of data validation. Some examples of the kinds of evidence that could supplement the sources are the results of experiments, surveys, and interviews. An appraiser should critically analyze and evaluate the validity and utility of all the sources to ensure the highest possible accuracy of the appraisal.