Factors influencing the quality of observations

Perception

Observation is highly dependent upon the perception of the observer. Perception involves both visual and intuitive processes and the interpretation of what you see is very dependent upon what you already know or have seen before. So for instance, two persons observing the same event may “see” it differently.

This can introduce an element of bias into the process of observation. Practical training in observation provides the opportunity to develop the skills. The more you know / see as a result of practice the better will your observation become.

Observation skills are very important to acquire as they lead to more reliable data being collected.

Precision and errors
This is very important for accuracy.

For good measurements to take place, the following need to be taken into account;

• They must be related to the problem under investigation
• Measurements must be comparable and standardized; all measurements must be collected in a logical manner, using a carefully defined protocol.
• Replication must be adequate; a common fault is to gather an inadequate number of data values, giving an inconclusive result.
• Errors must be identified and quantified.

Artifacts

Artificial features introduced during some treatment such as chemical fixation prior to microscopic examination need to be excluded from the interpretive process. This again requires practice in recognizing the different elements.

 

Related Links:
Replication
Errors

Examples of Observations
Rural tree decline
Pyrethrum Study
Japanese Ginger Plant

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