Dowel Balancing Summer 2006

There were three independent variables The hand in which the dowel was placed (left or right) The verbal task (no talking, saying the alphabet, or saying the alphabet backwards) Gender (a quasi experimental variable) (men or women)

Was there a main effect of gender? GenderMeanStd. Error Women Men It appears that men hand longer balance times, but was it significant? Check the Sig column in the next slide, if that value is less than.05, the result is reliable and you have a reliable main effect.

Source Sum of df Mean FSig Squares Square. Gender Error Because the Sig (p value) is less than.05 we found that men did in fact have longer balance times than women.

Was balance time longer in the right than the left hand? HandplacementMeanStd. Error Left Right It appears that balance times were longer in the right than in the left hand. But was this reliable? The next slide indicates the probability that the results were reliable.

Hand Placement – main effect Source Sum of df Mean FSig Squares Square. Hand Error Because the sig level is less than.05 we can say that balance times were longer in the left hand

Did Verbal Task Influence Balance time? VerbaltMeanStd. Error No talking Alphabet Backward It appears that balance times were longest when saying the alphabet forwards, but is it reliable?

Source Sum of df Mean F Sig Squares Square. Verbal Task Error Yes, balance times were long in the alphabet forwards condition

Gender by hand placement interaction GenderhandplaMeanStd. Error WomenLeft Right MenLeft Right It appears that there was more of a difference between left and right hand for men than for women

Source Sum of df Mean F Sig Squares Square. hand * gender Error Because the sig is greater than.05, this interaction was not reliable

The gender by verbal task interaction GenderverbaltMeanStd. Error WomenNotalk Alpha Back MenNotalk Alpha Back Looks like men had short balance times when saying the alphabet

Source Sum of df Mean F Sig Squares Square. Verbaltask * Gender Error Yes, men were more influenced by verbal task than women

Hand placement by verbal task HandVerbal MeanStd. Error LeftNotalk Alpha Back Right Notalk Alpha Back

Did handplacement interact with verbal task? Source Sum of df Mean F Sig Squares Square. handplacement * Verbaltask Error

Did men have a problem balancing in the right hand while saying the alphabet backwards? GenderhandplaverbaltMean Std. Error WomenLeftNotalk Alpha Back RightNotalk Alpha Back MenLeftNotalk Alpha Back RightNotalk Alpha Back

Results from the three way interaction Source Sum of df Mean F Sig Squares Square. handplacement * verbaltask * gender Error Yes, as predicted, men are more lateralized than women