Respondent
Universe:
The
respondent universe for this collection will be all recreational
visitors, age 18 and older, who visit ARCH and GRCA park during
the study periods.
Table
1: Sample Locations
|
Park
|
Sample
Period
|
Intercept
Location
|
ARCH
|
9/10-18/2016
|
Entrance
station
Fiery
Furnace trailhead
|
GRCA
|
10/8-16/2016
|
|
Sampling
Plan/Procedures:
A
systematic sample of all visitors (at all locations listed in
table 1 above) will be contacted by trained within the parks
during the survey period.
The
survey design and sampling plan for this collection visitor
studies is based upon a similar method applied system-wide for
Social Economic Monitoring (SEM) survey and previous versions of
the Visitor Service Project surveys.
The
sampling will be based on the 2015 visitation statistics. We will
intercept visitors at a 5 to 10 minute intervals. When each
visitor group is stopped and asked to participate we will
determine acceptance or refusal. If they accept the person with
the nearest birthday from the group will be selected, a
questionnaire and reply business mail envelop for returning the
questionnaire will be distributed to that person. Contact
information for follow up purpose and information used for
non-response bias checking will be recorded using a script as
described in the Instrument Administration section below.
If
the visitor refuses, information used for non-response bias
testing will be recorded as described in the section below.
Each
interviewer will be instructed to contact visitors at a
5-10minute interval at each of the park locations. For every two
hours of survey distribution a half hour counting period will be
performed. During the counting period, visitors will not be
contacted. The count data will be used for weighting the survey
results if needed. The actual interval used will be recorded on
the survey log by interviewers. The Interviewer will be trained
on every aspect of on-site surveying including: using sampling
intervals, avoiding sampling bias, and how to handle all types of
interviewing situations, especially safety of the visitors and
the interviewers. Quality control will be ensured by monitoring
interviewers in the field, and by checking their paperwork at the
end of each survey day.
Instrument
Administration:
The
initial contact with visitors will be used to explain the study
and determine if visitors are interested in participating. This
should take approximately 1 minute. All individuals asked to
participate in the study will be asked the non-response bias
questions to collect information that will be used in the final
analysis (see item 9e below). Visitors that refuse to participate
will be asked if they would be willing to take two minutes to
respond to the non-response bias questions. The number of
refusals will be recorded and used to calculate the overall
response rate for the collection.
Visitors
selected for participation in the survey will be read the
following script:
“Hello,
my name is _________. I am conducting a survey for the National
Park Service to better understand your
opinions about this park's programs and services.
Your participation is voluntary and all responses will be kept
anonymous. Would you be willing to take a questionnaire and mail
it back to us using the self-addressed envelope?”
-
If
YES
– then ask, “has any member of your group been
asked to participate in this survey before?”
|
If
“YES”
(already asked to participate) then, “Thank
you for agreeing to participate in this study we hope that
you will return the questionnaire soon. Have a great day.”
|
If
“NO”
(have not been previously asked to participate) then,
“Thank
you for agreeing to participate. Who in your group is at
least 18 years old and has the next birthday?
[The surveyor will ask them to start the process by
answering the non-response bias questions (listed below).
The responses will be recorded in spaces provided on the
tracking sheet. The surveyor will hand them a survey packet
including the questionnaire and a self-addressed stamp
envelope].
|
If
NO– (soft refusal) - ask them if they would be willing
to answer the non-response bias questions (listed below) and
then thank them for their time.
[The
surveyor will record responses in spaces provided on the
tracking sheet].
|
If
NO– (hard refusal) - end the contact and thank them
for their time.
|
Once
the visitor has agreed to participate in the study, we will ask
them to provide or personally record their name, address, and
phone number or email address on the survey tracking sheet –
this information will only be used to follow-up with all
non-respondents. At the end of the on-site sampling period, all
visitors accepting a survey packet on-site will be mailed a thank
you/reminder postcard within 11 working days. A reminder letter
with a stamped, addressed replacement questionnaire will be sent
to non-respondents 21 working days after the end of the survey
period. Once the data collection is complete, all hard copies of
contact information will be destroyed by shredding and deleting
any electronic files.
|
Date
|
Thank
you postcard (send to everyone)
|
within
11 working days
of initial contact
|
Replacement
mailing with reminder letter (send to non-respondent only)
|
21
working days after the end of the survey period
|
Expected
Response Rate/Confidence Levels:
The
same methodology for this collection has been applied in similar
studies at other NPS site with similar resources or in the same
geographical area and based on the data of the survey at ARCH in
2003 and at GLCA in 2007.
Arches
National Park at 73% (n=652) response rate (August 10-18, 2003)
Glen
Canyon National Recreation Area (summer) 59% (n=1,175) response
rate (July 14-20, 2007)
Glen
Canyon National Recreation Area (spring) at 64% (n=968) response
rate (May 2-8, 2007)
A
total of 2,092 visitors will be contacted during the sampling
periods (ARCH n=924 and GLCA n=1,168). We estimate that 1,925
(92%) visitors will agree on-site to participate in the survey.
The number of refusals will be recorded and reported in a survey
log, and will be used in calculating the response rate. Among
which 404 visitors at ARCH (44%) and 591 visitors at GLCA (55%)
are expected to complete and return the survey by mail. This
response rate was estimated based on surveys result of similar
NPS units in the area as cited in section b. Based on the survey
sample size, there will be 95% confidence that the day-use survey
findings will be accurate to within 4 to 6 percentage points.
|