Task 4: Imagine Twaddle and Sons, the publishers of Women are from Bras and men are from Penis, were upset about my claims that their book was as useful as a paper umbrella. They designed their own experiment in which participants read their book and one of my books (Field &

Hole, 2003) at different times. Relationship happiness was measured after reading each book. They used a sample of 500 participants, but got each participant to take part in both conditions (in counterbalanced order and with a six-month delay). Does reading their wonderful contribution to popular psychology lead to greater relationship happiness compared to my tedious book about experiments? The data are in Field&Hole.sav. ①