“An important question relates to where the first navigational choices should be located on the page. Is the navigation better placed at the top of the page, on the left or right panels? If three clicks (i.e., three navigational level selections) are required to get to the desired content, should they be grouped together at the top, left, right, or split between different locations (e.g., select from the top, with the next selection[s] from the left, top or right)?”

“Kingsburg and Andre’s research demonstrated that navigational selection limited to either the left or right panels resulted in the best human performance and strongest user preference. However, there appears to be a performance advantage when the first selection is made from the left navigation panel as compared to the right navigation panel. This difference may be explained by the reading pattern of the participants (i.e., English reading requires reading from left to right and top to bottom).” (Source: Usability.gov, Author: Dr. Bob Bailey)

Left Hand Navigation is Best