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Sample Recommendation Report 543

8
Our research indicated that there are two major technologies used in clicker The writers present just enough
systems: infrared (IR) and radio frequency (RF) (Ohio State University, 2005). information about the two
IR, which is the technology used in television remote controls, requires a clear technologies to help the reader
line of sight and has a limited range (40–80 feet). If IR is to be used for greater understand their logic. Writers
distances, the room would need to have additional receivers installed on the sometimes present too much
walls and connected either by wires or wirelessly to the instructor podium. In information; write only as much
addition, IR signals can be disrupted by some classroom lighting systems. as you need to get the job done.
By contrast, RF systems do not require a clear line of sight, have no range
limitations, and are not subject to electronic interference. An RF system uses
a receiver built into a USB device that attaches easily to the computer in the
podium or to the instructor’s laptop. For these reasons, RF systems are simpler
and are becoming the industry standard.
However, IR systems are less expensive, with clickers costing less than $10.
Therefore, if CMSU lecture halls meet the line-of-sight and range requirements,
already have receivers installed, and pose no interference risk, IR systems
would be an option. But if any of the lecture halls does not meet one or more of
these criteria, CMSU should consider only RF systems.

We began by meeting with Marvin Nickerson, the Director of Physical Plant, on
November 8, 2011, to explain our project and to give him a list of the questions
we needed to answer. Table 1 shows the questions we posed, as well as the Although the writers could have
rationale for each question: broken Table 1 across pages
8 and 9 of the report, a choice
that would have saved some
space, they decided to place the
entire table on page 9, making it
a little easier for readers to see
all the information at once.

19_MAR_67948_Ch19_512-562.indd 543 11/29/11 3:36 PM