Table notes

Number tables consecutively as they appear in your
text. Use only whole numbers, no 5a, 5b, etc. See recent issues of the
American Psychologist or other APA journals for more complex table
layouts. "Tables are efficient, enabling the researcher to present a large
amount of data in a small amount of space" (APA, 2001, p. 147).

• Place tables close to where they are first mentioned in your text, but do
  not split a table across pages. (Tables in papers submitted for review or
  publication are placed on separate pages at the end of the paper.)
  
• Label each table beginning with the table number followed by a description
  of the contents.
  
• Horizontal rules (lines) should be typed into tables; do not draw them in by
  hand.
  
• Each row and column must have a heading. Abbreviations and symbols (e.g.,
  "%" or "nos.") may be used.
  
• Do not change the number of decimal places within a column.
  
• Do not change the units of measurement within a column.
  
• "Use a zero before the decimal point when numbers are less than one" (APA,
  2001, p. 128). Write "0.23" not ".23" unless the number is a statistic
  that cannot be larger than one, for example a correlation r = .55, or a
  probability p < .01.
  
• Add notes to explain the table contents. These may be general notes or
  footnotes. The latter are labeled "a, b, c, etc."
  
• Use asterisks to indicate statistical significance explained in the
  probability level note at the bottom of the table. "Assign a given alpha level
  the same number of asterisks from table to table within your paper, such as
  *p < .05 and **p < .01; the largest probability receives the
  fewest asterisks [the smaller probability get more asterisks]" (APA, 2001, p.
  170).
  
• You may both single space and double space within a table to achieve
  clarity. Tables in papers submitted for review or publication (only!) must be
  double spaced throughout.