Review:

• OOP
• Functions

Consider the following snippet:

d = {1: 'hello', 2: 'goodbye'}
d2 = {True:  "somestring", False: ""}
if d2.pop(False):
    x = d.pop(1)
else:
    x = d.pop(2)

1. What will be the value of x?
2. What will be the value of d2?

Consider the following snippet:

def map2(function, arguments):
    result_list = []
    for arg in arguments:
        result_list.append(function(arg))
    return result_list

def square(n):
    return n * n

1. What will be the result of map2(square, [1, 2, 3, 4, 5])

Consider the following snippet:

def strange_loop(l):
    out = []

    for item in l:
        if item is None:  # `item is None` evaluates to True when item contains None
            return out
        out.append(item)

    return out

1. What will be the result of strange_loop([1, 2, 5, 9, None, 3, 1, 1, None])

Comments & Docstrings

• What is the purpose of a docstring?
• What is the purpose of a comment?

Let’s write a script!

Requirements:

1. Download tab-delimited data file from https://goo.gl/H0vV4x
2. Reshape data into a dictionary whose keys are the column names and whose values are the columns (in the form of a list).
3. Calculate mean response error for each SOAxCongruency condition
4. Eliminate outlier RT values, and calculate median RT for each SOAxCongruency condition