I wonder if watching this video that shows the sheer volume of air
traffic over North America at any given moment has any impact on base
rate estimates:
http://www.aaronkoblin.com/work/flightpatterns/FPWeb_Final_3.mov 

The middle segment provides an interesting way to visually depict data.

Sue


-----Original Message-----
From: Ken Steele [mailto:[email protected]] 
Sent: Wednesday, March 25, 2009 4:23 PM
To: Teaching in the Psychological Sciences (TIPS)
Subject: Re: [tips] Rick Steves: Travel guru reports on a little
psychology


I agree with Rick that there are two aspects to this calculation 
when you are trying to describe whether a greater fear of flying 
is irrational.  The personal base rate of driving relative to 
flying would suggest that driving is a safer activity in that we 
have more experience of safe driving trips.  The lack of 
knowledge of the base rate of trips in the air would contribute 
to this fear.

But here is the question for me.  Assume that people don't know 
the actual number of flights per day and underestimate that 
value.  If they base their decision on that underestimate, are 
they being irrational?  Or are they being rational, but working 
with incorrect assumptions about the data?

Ken

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