"based on personal observations" is a correct phrase in written English.
It is most often used when discussing a conclusion or opinion that has been reached after personally analyzing a situation or experience. For example: "My conclusions regarding this issue are based on personal observations."
In another checklist, the officer is asked to note whether the suspicion was based on personal observations, a radio report or a citizen's description of a crime.
In the past several days, a foreigner was able to get out a detailed message describing conditions in Pyongyang based on personal observations and the reports of foreign aid workers in the city.
The above-mentioned and illustrated MR findings in PsA are based on personal observations and seem to reflect the radiographic changes encompassing a mixture of osteitis, enthesitis and erosion.
I will be breaking this into a three-part post, and I want to begin this series by saying these are merely my thoughts based on personal observations while working in this sphere.
Species were placed into functional groups based on personal observations of foraging behavior and food choice, nesting ecology, and natural history descriptions taken from available literature.
Second, based on personal observations made over several years of studying MPE [2], [3], [4], [5], we knew that primary cultures derived from MPE initially displayed marked culture heterogeneity on their way to establishing morphologically homogeneous cancer cell lines.
In 1922 the American director Robert Flaherty presented Nanook of the North, a record of Eskimo life based on personal observation, which was the prototype of many documentary films.
"One thing I would say, based on personal observation, is that if you eat large amounts of anything that makes you feel great, don't keep high levels of intake all the time," he said.
Vertebral count data were based on personal observation of specimens, as well as taken from the literature [ 38, 71- 73]; polyodontid data was based on illustrations in [ 70].
Only fossils that could be confidently assigned to clades based on personal observation and/or previous literature were included in the analysis [[ 118], Table 2].
The scorings of X. radiplicatoides are primarily based on the literature [ 15], those of X. junggarensis (= X. latimarginalis[ 72]) on personal observation of IVPP material from Pingfengshan [ 72], those of X. (Annemys) levensis, and X. (Annemys) latiens based on personal observation of PIN material, and those of B. macrobios based on the literature [ 60] and photographs obtained from H. Tong.
