Preliminary analyses over pilot data to see if it makes sense.

General sample characteristics

The pilot data contains 438 subjects.

Some preliminary correlations

Dictator game behavior

There is a significant positive relationship between the perceived ability to feel pain and the proportion of the stake awarded in a dictator game. But for a thorough analysis we will need a linear model accounting for subject.

Hierarchical linear model

## Linear mixed model fit by REML. t-tests use Satterthwaite's method [
## lmerModLmerTest]
## Formula: dictator_offer ~ feel_emo + (1 | ResponseId)
##    Data: data_wide
## 
## REML criterion at convergence: -349.4
## 
## Scaled residuals: 
##     Min      1Q  Median      3Q     Max 
## -5.1392 -0.5775 -0.0084  0.5992  4.7864 
## 
## Random effects:
##  Groups     Name        Variance Std.Dev.
##  ResponseId (Intercept) 0.04959  0.2227  
##  Residual               0.04731  0.2175  
## Number of obs: 7884, groups:  ResponseId, 438
## 
## Fixed effects:
##              Estimate Std. Error        df t value Pr(>|t|)    
## (Intercept) 4.117e-01  1.126e-02 4.911e+02   36.56   <2e-16 ***
## feel_emo    3.736e-03  1.175e-04 7.874e+03   31.79   <2e-16 ***
## ---
## Signif. codes:  0 '***' 0.001 '**' 0.01 '*' 0.05 '.' 0.1 ' ' 1
## 
## Correlation of Fixed Effects:
##          (Intr)
## feel_emo -0.245