Description Usage Arguments Value Author(s) References See Also Examples

Implements a 2-level bootstrap. The bootstrap first draws a sample of level-2 units with replacement, and in a second stage draws a sample of level-1 observations with replacement from the level-2 units. Following each bootstrap replication, the Intraclass Correlation Coefficient 1 is estimated using the lme function.

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`x` |
A vector representing the variable upon which to estimate the ICC values. |

`grpid` |
A vector representing the level-2 unit identifier. |

`nboot` |
The number of bootstrap iterations. Computational demands underlying a 2-level bootstrap are heavy, so the examples use 100; however, the number of interations should generally be 10,000. |

`aov.est` |
An option to estimate the ICC using aov. |

Provides ICC(1) estimates for each bootstrap draw.

Paul Bliese paul.bliese@moore.sc.edu

Bliese, P. D. (2000). Within-group agreement, non-independence, and reliability: Implications for data aggregation and analysis. In K. J. Klein & S. W. Kozlowski (Eds.), Multilevel Theory, Research, and Methods in Organizations (pp. 349-381). San Francisco, CA: Jossey-Bass, Inc.

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multilevel documentation built on May 19, 2017, 3:24 p.m.

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