The
Baltimore Sun also published my
letter in response to a pop science story they ran on fetal learning.
(The Sun's version appears to have fallen down the memory hole, but here's
the original Reuters reports: it's very similar to the Sun story, except
the Sun changed "babies in the womb" to
"fetuses".) The Sun has a pay wall, so I'm reproducing
the letter here:
Your headline "Fetuses show signs of
learning at 34 weeks" (July 27) was inconsistent with the content of the
story accompanying it.
The author admitted that the findings were
"not statistically significant." In layperson's terms, "not
statistically significant" means that the evidence is not strong enough
support a conclusion one way or the other.
Scientist Carl Sagan famously said that
extraordinary claims require extraordinary evidence. To claim that fetuses show
evidence of learning three weeks earlier than previously thought, the authors
would have to show convincing evidence that the earlier work was mistaken. But
because their findings were not statistically significant, they can offer no such
evidence.
Science journalists are the final interpreter of
science for the public. It is their duty not just to report recent findings but
also — and more importantly — to critically evaluate them for their
non-scientist readers.
The letter was edited somewhat: for brevity, I guess. Here’s the original text:
Your
recent headline "Fetuses show signs of learning at 34 weeks" was
inconsistent with the content of the story. The author admitted that the
findings were "not statistically significant". In layperson's
terms, "not statistically significant" means "the evidence is
not strong enough support a conclusion one way or another". Carl
Sagan famously said that extraordinary claims require extraordinary
evidence. To claim that fetuses show evidence of learning three weeks
earlier than previously thought, the authors need to show convincing evidence
that the previous work was mistaken: because their findings were not
statistically significant, their findings are not such evidence. The
author was wrong to "cautiously" conclude, the reviewers were wrong
not to insist on removing that conclusion, and the journal was wrong to publish
that conclusion, but science journalists are the final interpreter of science
for the public. It is the sacred duty of a science journalist not just to
report recent scientific findings, but also, more importantly, to critically
evaluate them for their non-scientist readers.