An alarming new study has found that psychological studies from just a years ago may be completely useless.

A research team has had trouble replicating scientific studies on how people act or think, raising new questions on just how good psychology research is, according to an Agence France-Presse report.

A team of 270 scientists put 100 psychology and social science studies to the test, all of which had been published in three top peer-reviewed journals in 2008, and what they found was shocking: just 39 percent had the same results as the initial reports.

These new findings, which were published in the journal Science, suggests that there’s still a lot we don’t know in the field of psychology.

The studies that were examined often had to do with the social lives and interactions of people with others, and often dealt with perception and memory.

The concerning findings don’t devalue any known medical therapies, but scientists are going to take a closer look at cancer biology studies as a result.

One of the editors of the study cautioned that the findings don’t necessarily indicate that these theories are false, but it means people should be less confident about the original results of these experiments.

Another researcher said it’s indication that scientists need to always be questioning themselves. Scientists are human too, and they can sometimes cherry-pick their data subconsciously. Also, sometimes study sizes are too small and that can lead to false negatives or positives.

Then there’s the fact that scientists are pressured to publish research in top journals, and that can lead to them — subconsciously or consciously — trying to get more compelling results.