Phase I Data Collection Page

Device/Rater Accuracy

 

INSTRUCTIONS

 

Each rater will have ten lambs presented to him/her, one at a time.  The lamb ID number/ear tag number will not be communicated to the rater, only the person recording lamb ID and measurements.  Once the rater has measured all ten lambs and measurements have been recorded for each lamb, the rater will a second time measure all ten lambs in random order.  The rater will have his/her back to the pen of lambs as someone else will catch and present each lamb to the rater.  It is important to keep the ID of each lamb unknown by the rater.  This same process will be carried out by each of the 6 raters.

 

Use of the Device

With the lamb on its feet, the detail device will be placed under the tail with the tail contained in the trough created by the PVC pipe.  Ensure that the flange is in firm contact with the pen bones and that the device is held level.  Slide the plunger into the device until contact is made with the tail.  Record the graduated mark on the device that the distance indicator completely extends beyond (not the closest mark).  If the distance indicator lies exactly on a graduated mark on the device, record that mark.